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Tony Hoare on how he came up with Quicksort:
he read the algol 60 report (Naur, McCarthy, Perlis, …)
and that described "recursion"
=> aaah!
> boomers were children of hippies
The hippies largely were Boomers, not their children.
Who would you say is your primary competitor (besides Stripe) and how are you better than them today?
Moltbook both asks you to verify with Twitter and has you verify an email address too.
Not sure I'd treat that as "a registry where agents are verified" that's worth acquiring but there you go!
Rest in peace, he hasn't seen the industry change.
"A consequence of this principle is that every occurrence of every subscript of every subscripted variable was on every occasion checked at run time against both the upper and the lower declared bounds of the array. Many years later we asked our customers whether they wished us to provide an option to switch off these checks in the interests of efficiency on production runs. Unanimously, they urged us not to they already knew how frequently subscript errors occur on production runs where failure to detect them could be disastrous. I note with fear and horror that even in 1980 language designers and users have not learned this lesson. In any respectable branch of engineering, failure to observe such elementary precautions would have long been against the law."
-- C.A.R Hoare's "The 1980 ACM Turing Award Lecture"
Sorry, but no, that is not a detail, that is a major sticking point for me.
> I’m tired of every AI capability at SaaS companies charging usage fees. I get it: they both have their own token costs and want to make a profit on the feature. But it makes a $50 a month product potentially hundreds if I’m not careful.
Well, I understand how, as a user, yoou’d prefer your $50 subscription to include hundreds of dollars of subsidies for the costs of consuming third-party AI resources, but other than a startup spending VC to buy a userbase and force the traditional unsubsidized competition out of business before milking their new monopoly hard to payback investors, how do you expect a firm to justify that?
He was the professor in the Programming Research Group (known universally as the PRG) at Oxford when I was doing my DPhil and interviewed me for the DPhil. I spent quite a bit of time with him and, of course, spent a lot of time doing stuff with CSP including my entire DPhil.
Sad to think that the TonyHoare process has reached STOP.
RIP.
Atlantic Meridional Overturning Circulation (AMOC)
https://en.wikipedia.org/wiki/Atlantic_meridional_overturnin...
State censorship is a different kind of centralization.
>... its ability to expand when swallowing enormous prey, right up to the size of a cow, which is virtually impossible for most people to comprehend.
> and approaches Linux performance in some areas (e.g. Networking)
I started using FreeBSD 26 years ago when I worked for Sendmail, who had a couple of core committers on staff or staff-adjacent. Back then the refrain was "it can't do nearly as much as Linux, but what it does do it's much better than Linux".
And specifically it was known that if you wanted the best possible networking stack, FreeBSD was the choice to make (And also why Netflix uses it, for the networking stack).
All this to say, is it true that Linux now has better network performance, or did you mistype that?
There are already several ones in Europe.
The only things I'm aware of that I consider actual problems it solves are "it breaks classical encryption" and "you may be able to use it to directly model other quantum systems like for protein folding and such".
Everything else I consider pretty silly. "It can improve logistics" - I'm fairly sure computers are already as good as they can be, what dominates logistics calculations isn't an inability to optimize but the fact the real world can only conform so closely to any model you build. "It can improve finance" - same deal, really. All the other examples I see cited are problem where we've probably already got running code that is at the noise floor imposed by reality and its stubborn unwillingness to completely conform to plans.
If I had $1 to invest between AI and quantum computing I'd end up rounding the fraction of a cent that should rationally go to quantum computing and put the whole dollar in AI.
By far the most exciting possibility is one that Scott Aaronson has cited, which is, what if quantum computers fail somehow? To put it in simple and unsophisticated terms, what if we could prove that you can't entangle more than 1024 qubits and do a certain amount of calculation with them? What if the universe actually refuses to factor a thousand-digit prime number? The way in which it fails would inevitably be incredibly interesting.
SSD is 2x faster read/write
Even some cheap Kindles came with a SIM card.
I expect this to happen if enough people block ads on TVs. (They'll probably promote it as a "backup connection" or something.)
But this isn't corporate censorship.
This is Russian government censorship. Where "constitutional rights" don't really apply, either. And probably quite a bit less sueable than Cloudflare.
https://tradingeconomics.com/germany/electricity-price chart is extremely noisy, and is quoting wholesale rather than retail, but to my eyes that actually looks flat over the period from before the Ukraine war. It seems to have started that spike in late 2021, before the war in February 2022 (which of course shoots it upwards, that's the "doubling in late 2022" you mention).
I built a landing page for my "business cards" that is all about React, Bootstrap and all that, even uses Helmet when I really should have just set the title directly -- and it came out to around a 512k bundle so if you wanna impress me with an unframework page you got to get it down to 200k or less.
If you want to reduce air travel for environmental reasons, then tax it more.
Shaming individuals doesn't seem to be productive or helpful.
Air travel works for people if the benefits outweigh the costs. The only thing that changes behavior is to change the costs.
And even if costs were 10x there are still plenty of people who will fly tons, because it would still be economically productive. There are always going to be people who fly 10x more than others, because certain jobs and roles simply require it.
My guess is the best market for space-manufactured objects is in space, particularly for objects which take advantage of the unique space environment, say, large solar sails or solar collectors.
1 and 2 were hyped up for the Space Shuttle in the 1990s and you know how that went. 3 is newer but all the time I read stuff on "why biological systems don't work quite right in zero gravity" so it might be more like space travelers will want to go to Earth or spin things like an O'Neill colony to do those things than the other way around.
From the viewpoint of "get some numbers to run that can show it makes money" I like "new patents on blockbusters" but I'm skeptical that people on Earth won't find equivalent methods of manufacturing or that politicians will let you make those profits.
Congrats!
What convinced you this was the right moment and the right company to join?
You went from founding to acquisition in roughly a year and change.
Did something about the AI security landscape cause this offer to make sense? Or was it the impact you could have inside OpenAI? Or something else?
I feel like I'm the only one not getting the world models hype. We've been talking about them for decades now, and all of it is still theoretical. Meanwhile LLMs and text foundation models showed up, proved to be insanely effective, took over the industry, and people are still going "nah LLMs aren't it, world models will be the gold standard, just wait."
I did a lot of study of Lotus Notes circa 2015 when I was thinking about a no-/low-code future. It is still ahead of its time when it comes to having a document database that supports merging but it's unthinkable that you'd build a system like that around email today as today an email system is 99% spam filter and 1% other stuff.
... liquid glass isn't very liquid anymore. it's frosted.
Oh, that's a good one, I can see how that would put a lot of g's on the package. I think this will be a factor depending on the weight of the total assembly. If that weight is significant it will dampen the shockwave.
I miss what attempts were made to improve the code using modern C#, spans, ref structs, scoped, stackalloc, fixed arrays, and Native AOT, before going into full rewrite.
While tag dispatching used to be a widely used idiom in C++ development, it was a workaround for which nowadays there are much better alternatives with constexpr, and concepts.
If I build a museum full of stolen art it can still be hard to make and expensive. It would be entirely unreasonable to charge for it.
Hiring managers could help here: the only thing that should count as a positive when - if - you feel like someone's open source contributions are important for your hiring decision is to make it plain that you only accept this if someone is a core contributor. Drive-by contributions should not count for anything, even if accepted.
>I guess I don't necessarily hate it, it's more of a neutral thing, but who is deciding these strange things??
Probably nobody, just some artifact of the overlay APIs used default behavior that they didn't bother to streamline.
> I don't buy the 10x efficiency thing: they are just lagging behind the performance of current SOTA models. They perform much worse than the current models while also costing much less - exactly what I would expect.
Define "much worse".
+--------------------------------------+-------------+-----------+------------------+
| Benchmark | Claude Opus | DeepSeek | DeepSeek vs Opus |
+--------------------------------------+-------------+-----------+------------------+
| SWE-Bench Verified (coding) | 80.9% | 73.1% | ~90% |
| MMLU (knowledge) | ~91 | ~88.5 | ~97% |
| GPQA (hard science reasoning) | ~79–80 | ~75–76 | ~95% |
| MATH-500 (math reasoning) | ~78 | ~90 | ~115% |
+--------------------------------------+-------------+-----------+------------------+It is quite common when being around WG21 stuff, just as info.
The GPL talks about "the preferred form for modification of the software", and I'm starting to think that anything which involves any kind of LLM agent should be including all the text that the user gave to it as well. Prompts, etc.
Of course, even then it's not reproducible and requires proprietary software!
When you grow up you should want universal healthcare...
No, the number is made up, I'm saying that there's a point where the advice makes sense. Whether or not that's actually the case now is then a matter of statistics.
The right way to start is with LispWorks or Allegro Common Lisp, exactly the surviving Common Lisp IDEs, instead of building your own IDE out of Emacs and SLIME.
However I do agree with the AI part.
Also, despite the CPU being 1000x slower, redraws were extremely fast. If they weren't quite fast enough, then the combo of deterministic keyboard nav and a reliable type ahead buffer meant the user could queue up a burst of actions from muscle memory.
And yet: current state of the art models are also great at navigating and trying language ecosystems that aren't as mainstream. So if you're curious it's now great to explore topics, languages, concepts that — even if not mainstream — were so far a bit out of reach.
Yes, used it on MS-DOS 3.3, until getting hold of Works for MS-DOS.
Is that because you don't believe we should use AI, or because you do not agree with “if you aren’t paying for the product, you are the product.”
Priorities on what tickets to work on, and Apple being proudly underresourced.
No, the President does not have “full naming rights” over entities defined and named in statute law. The President is bound to faithfully execute that law, but to change it (even if that change is merely to the name of a department or title of an officer specified within it) requires a bill to that effect to be passed by a majority of each house of Congress, which the President may then sign into law, effecting the change.
It would be a brilliant move if it wasn't castrated with 8 GB, even my netbook from 2009 got upgraded to 16 GB during its lifetime, which ended in 2024.
A netbook from 2009, already had the capability to get RAM sticks up to 16 GB in total, go figure!
> I don't like paltry sums like this. $300 is a significant financial impact to someone who's barely making ends meet, and absolutely nothing at all to a billionaire.
One thing about daycares is that you will essentially never find "someone who's barely making ends meet" and "a billionaire" with kids at the same daycare, so a surcharge for out-of-normal-expectations service does not need to be designed to address both cases.
(In fact, you'll probably not find a billionaire with kids at any daycare, their hired childcare workers won't be shared with other people, and will probably be adequately compensated up front in a way which anticipates a fair degree of schedule variability.)
OTOH, with red light cameras, you also don't need to scale the fine to work with both, because the entire purpose is to bind the lower classes while exempting the upper from any substantial burden. (The least cynical explanation is that it is to discourage behavior which might incur liability grossly exceeding the mandatory level of insurance company by those least able to cover the cost of that liability, thereby avoiding uncompensated harms, but the realistic explanation is...not so generous.)
Hi Vlad,
Turnabout is fair play, you should know that by now. You seem to have the idea up your bonnet that you are in a position to lecture, that sort of thing is best done from a position of maturity. Your incessant attacks are far more against the spirit of HN than anything that I've written in this thread.
Your criticism does not take into account anything beyond the first layer of what I've written and does not apply leeway for cultural or other differences, which you seem to want to flatten to 'whatever Vlad says' being the norm.
Your intolerance is the problem here, not my writing. I asked you because I wanted you to have a chance to clarify your view before criticizing you because that's only fair. It could well be that you had an actual reason besides having long toes.
I don't like to be lectured by those that have ethics issues themselves on ethics and I don't like to be lectured on the tone of my writing by those that have issues themselves with the tone of their own writing.
For someone who has been here for as long as you have I'd expect a more balanced view on the contributors to HN and a much better contribution:flagged comments ratio than you seem to rack up.
If you really want to improve the tone on HN by reducing hostility, snark, unprofessionalism and now personal attacks then I suggest you seek out a mirror. Your own behavior in this thread shows examples of all of those and you are neither a credit to yourself or your employer.
It's a common problem to get excited about networks, build a large one, and then by stuck with an unapproachable hairball. If you want to explore network structure, consider using tools like quadrilateral simmelian backones which can provide an opinionated look at what matters in the network.
programs that have no good Linux equivalent
There is WINE.
But it's not bad enough yet to have a New Coke type consumer rejection.
All corruption (and other dishonest ways of making profit or advantage) is graft, to attempt sell something under false pretenses is to grift [0].
Grifting is often among the techniques used to effectuate graft.
IMO, the upthread post reads better with “graft” which is a abstract noun, matching the use upthread, where “grift” is usually a verb (I've also seen it used as a concrete now for a particular operation in which the agent is perceived to be grifting.)
[0] Most dictionaries I think will still say this is specific to small-scale swindling, but I think that's a lagging indicator; IME, usage has drifted to be more generalized, with large scale operations often referred to as grifting.
The title does not all accurately describe the article IMO. Zuckerberg is not "finished" with Alexander Wang, whatever that was supposed to mean.
Best bit:
Put in an unreasonable amount of effort
> Earlier I made an analogy to being an explorer; here's another I like even more. Think of yourself as a wildlife photographer. Obviously you need to be in the right place (you won't get a great picture of anything from your couch) and you need to be skilled at your craft. But once you've met those preconditions, the way to get the best picture is to just spend an unreasonable amount of time waiting for exactly the right circumstances to arise.
> Same with ⌃ being a pinky not retained when ⇪ replaced it
Any time I get a new computer, one of the very first things that I do is remap Caps Lock to Ctrl for exactly this reason. I literally never use Caps Lock, but my pinky hits it all the time.
The majority of the artist responses were "hard no" in 2024. There's no way the artist demographic such a service would appeal to would be on board with anything even tangent to AI in 2026 (even done ethically) where the professional liability far exceeds the potential revenue.
I mean, the very first paragraph of TFA is describing who is under that impression. Literally the first sentence:
> My LinkedIn and Twitter feeds are full of screenshots from the recent Forbes article on Cursor claiming that Anthropic's $200/month Claude Code Max plan can consume $5,000 in compute.
> With the files API, apps could actually replicate the microsoft word experience of drafting a file and saving it to your desktop and praying that your hard drive doesn't fail,
Even withou the files API, with local storage, web apps can (and some—mostly extremely casual games that are free—do!) duplicate that experience with the extra risk of your data being lost because your disk became too full or some other event causing the local storage to be cleared.
> Unfortunately for Anthropic, the Constitution does not require the government to purchase goods or services from a company that has made a public declaration that it will not allow its AI models (specifically Claude) to be used for mass domestic surveillance or to power fully autonomous weapons, if such a declaration goes against the government's contract requirements.
Obviously, if the contract requirements themselves are lawful, the government has the power to purchase only those goods and services that meet the requirements, and to not purchase those that do not.
But that's irrelevant, because the "supply chain risk" designation is not needed if the government is merely trying to assure that the good and services in a contract meet the requirement of the contract, it is a separate legal provision with separate purposes that would be superfluous for the purpose described.
If the government is using the "supply chain risk" designation as a backdoor way to rewrite all previously-entered, still-in-force defense contracts to retroactively add new requirements incompatible with the use of Anthropic software given their limitations on the service Anthropic is willing to provide, that also is not what the "supply chain risk" designation exists for, and, even if were to seem facially within the statutory purpose of the authority, would raise 5th Amendment takings issues.
> There are plenty of example, even recently, of billionaires losing their fortunes
Billionaires aren't on the same level of wealth as hectobillionaires, just like decamillionaires aren't on the same level of wealth as billionaires.
Thousands, perhaps millions of people use Anki with no manipulation or social component, just internal drive. Maybe start your research there.
Yes, Amazon Retail being the sole significant customer of AWS, I guess?
> The tech industry often talks about “the cloud” as though it were something abstract and untouchable. But the cloud runs on data centers, those data centers have an address, and that address can be hit by a drone.
Nominating this as the best opening line I have read in a while.
I read that it is statistically more dangerous to fly on a private jet than a commercial one.
From a 2026 perspective I couldn't possibly have had as a teenager in the 1990s, it kind of feels like a well-polished, extended SCP story.
As I can in 2026 gorge myself on "mysterious things doing mysterious tasks mysteriously", now an entire sub-genre of its own, I'm pretty sure the impact if I read it for the first time today would be somewhat muted by comparison.
I am also reminded of the J. J. Abrams "mystery box storytelling" technique. Rendevous with Rama was perhaps one of my first encounters with the technique, so I have fond memories of it. But in 2026 I find myself tired of the "woo woo there's a mystery and we're not going to tell you what it is" because in the end, all mystery boxes are fundamentally the same, and I've seen enough of the mystery box. It has its place in history but if a random person who has never read sci-fi of this era wanted a recommendation to start with, this would be way, way down on my list, unless you explicitly want to read things significant to the genre.
But as I've tried to make clear by my repeated references to the present time, that's my 2026 review. For the time it was a fine book.
Some of the ringworld covers were quite good.
Nobody said anything about "superfluous" comments.
I'm assuming "lots of comments" means lots of meaningful comments. As complex code often requires. Nobody's talking about `i++; // increment i` here.
Tags do nothing, email the mods if desired. Bottom bar has deets (“contact”).
> I just think we could have transitioned away at the turn of the previous century... and saved ourselves a lot of pain.
I mean, that's a hugely provocative statement that needs to be backed up with some level of analysis.
You need to look at all of the industries and products that would have become impossible, and what the ramifications of that are.
Even today, you're basically proposing that entire industries, such as long-distance air travel, effectively disappear. And that sea shipping effectively regresses to sailing ships? I can't even imagine how one could begin to perform an even remotely plausible analysis, given how much each industry relies on other industries, and how difficult it would be to estimate how other technological advances would have developed instead.
This is interesting (and I've seen it mentioned in some editors), but how do I use it? It would be great if it had bubblewrap support, so I don't have to use Docker.
Do you know if there's a cli or something that would make this easier? The GitHub org seems to be more focused on the spec.
The parts that are not hearsay from anonymous sources, which basically means any paranoid story that the FBI still has to document, or blackmailers and grifters with plenty of holes and inconsistencies to their stories, are about about elites partying with 17 and above year olds who where otherwise active already in related "work". Still shady, but hardly what's being reported in the sensationalist coverage, which ranges from abductions and rings to acid baths for murdered victims.
https://www.mtracey.net/p/we-need-to-talk-about-virginia
https://www.mtracey.net/p/epstein-survivors-refusing-questio...
I am mainly a code monkey but I have done enough to know that Product Hunt is not a marketing plan and was never a marketing plan unless your product is something that will get you a #1 day on Product Hunt.
Is there a legal distinction between training, post-training, fine tuning and filling up a context window?
In all of these cases an AI model is taking a copyrighted source, reading it, jumbling the bytes and storing it in its memory as vectors.
Later a query reads these vectors and outputs them in a form which may or may not be similar to the original.
I only use the source code repositories and have had little trouble in the last few months except for that time there was a network partition.
Sorry, I misspoke. Transformation is what makes the LLM itself legal -- its training data is sufficiently transformed into weights.
And so, a work being sufficiently transformative is one way in which copyright no longer applies, but that's not the case here specifically. The specific case here is essentially just a clean-room reimplementation (though technically less "clean", but still presumably the same legally). But the end result is still a completely different expression of underlying non-copyrightable ideas.
And in both cases, it doesn't matter what the original license was. If a resulting work is sufficiently transformative or a reimplementation, copyright no longer applies, so the license no longer applies.
Plenty of enterprise server hardware (racks, servers, RAM, disks) does have an active secondhand market after 3-5 years of use, but I think GPUs are too specialized for it to be viable. I doubt anyone has the setup to run a H200 in their home rig.
I also don't think companies are going to have mandatory replacement cycles for GPU hardware the same way they do for everything else, because:
1. It is an order or magnitude (or more) more expensive.
2. It isn't clear whether Moore's law will apply to the AI GPU space the same way it has for everything else.
Unless Nvidia can launch a new chip every 2-3 years with massively improved performance-per-watt at a lower price no one is going to rush to recycle the old one.
Yeah except you didn't actually find a vulnerability, you just searched for a pattern, found it, and thought "vulnerability" because you aren't a security researcher and don't realize that context is important.
You should educate yourself more before you go around slandering people.
2010 is also good. The movie is also competent, but it could never fill the shoes 2001 left.
The user you're responding too lists a "blood test viewer" [0], which looks to be a tool that turns his blood test PDFs into structured and analyzed data. You're saying that unless he continuously revises/upgrades the code, it's still "abandonware" even if it meets his needs for the near future?
providing cheap energy
From what, turf? Back in the 1980s Ireland was importing coal from Poland because domestic mines weren't efficient. You're full of it.
> The issue has drawn attention to the dire state of the health system in the southern Italian region, which paradoxically has an unemployment rate of about 20% yet struggles to attract medical staff. Working conditions there are notoriously harsh, largely because the remaining doctors and nurses shoulder an enormous workload.
Indentured servitude.
Something to consider for installations like this is a way to accept J1772 and NACS EV charging cables, allowing for charging at low or no cost from these level 2 chargers. Great write up by the author.
> running them doesn't require prohibitive expenses on hardware
What async tasks could a local LLM accomplish on Intel 11th gen CPU with 32GB RAM?
Sounds like the goalposts are moving from "not useless stuff focused on pretending to improve productivity or projects that make it easier to use AI" to "extremely useful stuff".
There is a lot of weirdness around Mastodon, particularly some people can’t seem to make up their minds if they want the stuff they post to be visible or not.
Do parking tickets result in “a formal finding of guilt, and consequences tied to a driver’s record”?
How many times will the same report be regurgitated and reposted? There is nothing added here that the original source didn't cover already (https://www.svd.se/a/K8nrV4/metas-ai-smart-glasses-and-data-...). Read that instead of the derivative blogspam.
The phrasing "HR isn't there to protect you, it's there to protect the company" applies more here.
My experience is also that HR is very reasonable and cooperative with harassment claims. But the thing is that when you have a legit harassment claim, the law is there to protect you. You could make things very expensive for the company in court, and so protecting the company does mean protecting you and treating you respectfully and cooperatively.
If HR investigates and finds you don't have a legit case and that in fact you may have been the instigator, then protecting the company probably means getting rid of you. Your judgment and account of the facts is questionable in that case, and you're a liability from the other side.
I don't know exactly what happened in this case, but in the harassment case I've had to handle as a manager, the (male) employee said that the (female) victim had initiated everything and had this weird fascination with him, while the paper trail that everybody could see clearly showed that he was both the instigator and the one behaving improperly. Projection is strong in cases like these. So it's entirely possible we're not getting the full story from this anonymous blog post.
That's not at all incompatible with Bluesky having a funded company with a CEO.
The term they use for this is "credible exit" - designing the entire protocol such that if the company itself misbehaves the affected users can leave to a separate instance without losing their relationships or data.
PTC and Aicas aren't Java on smartcards, they are Java on high integrity computing where human lives might be at stake.
Interesting how compiler specific extensions are ok for C, with a freestanding subset, or Rust no_std, but when it goes to other languages it is no longer the same.
I stand corrected on async Rust then.
The only value driving most things you see online is the value of money. Which is not the kind of values they are referring to.
> The devices will not carry the band support needed for these [non-EU] markets.
Would they have zero radio coverage, or sub-optimal coverage?
Could be a feature for those wanting a Wi-Fi only mobile Linux device.
The thing I most want to use this (or some other WASM Linux engine) for is running a coding agent against a virtual operating system directly in my browser.
Claude Code / Codex CLI / etc are all great because they know how to drive Bash and other Linux tools.
The browser is probably the best sandbox we have. Being able to run an agent loop against a WebAssembly Linux would be a very cool trick.
I had a play with v86 a few months ago but didn't quite get to the point where I hooked up the agent to it - here's my WIP: https://tools.simonwillison.net/v86 - it has a text input you can use to send commands to the Linux machine, which is pretty much what you'd need to wire in an agent too.
In that demo try running "cat test.lua" and then "lua test.lua".
BASIC for 8-bit computers was an interesting language. It was limited in many aspects, but taught a whole generation about how computers actually worked. Apart from non-native data types (strings and floats), it was quite close to the machine - GOTO and GOSUB map very neatly to (in 6502) JMP and JSR.
Fantastic news, the longer the price is held up, the longer oil price levels tilts the economics towards electrification.
As Iran Crisis Upends Oil and Gas, Clean Energy Gets Complicated - https://www.bloomberg.com/news/articles/2026-03-02/middle-ea... | https://archive.today/fIND6 - March 2nd, 2026
> The European Union has already seen the benefit of pivoting to renewables after Russia’s invasion of Ukraine, though it also sought alternative sources of gas which are now under threat. Between 2019 and 2024, EU countries installed enough wind and solar capacity to avoid burning 92 billion cubic meters of gas and 55 million tons of hard coal in 2024, according to Agora Energiewende.
> “We’ve had tangible results,” said Frauke Thies, the think tank’s Europe director. “It was thanks to renewables that Europe wasn’t hit harder by the last energy crisis.”
Insert here the New Yorker cartoon about the shabby business executive around a campfire with a bunch of kids crowing "Yes, the planet got destroyed, but for a beautiful moment in time we created a lot of value for shareholders."
Canada is physically safer for certain classes of humans as of this comment. That may change depending on if Canada is faced with defending against a physical/military attack by the US, but as of today, the risk assessment and threat model is somewhat clear.
As an American, you can even vote from another country if necessary. No need to remain on US soil to live a good life or to contribute to change from a far. Staying isn't going to fix the problem either if the electorate continues to vote poorly, which you as an individual have no control over. Optimize for your quality of life for the subject time horizon.
Not really. The idea that "fiduciary duty" requires companies to maximize shareholder value is a pernicious Internet myth.