We have been in a global pandemic for one year now. Meanwhile, nothing has really shifted in terms of market value of world-class engineers. If a pandemic isn't enough to cause the "bubble" to burst, any reasonable person would struggle to say that doom and gloom is impending. Software is still eating the world (arguably even moreso as of late).
If companies are fighting for remote talent by showering them with the same kind of compensation packages as they would have gotten in San Francisco and New York, how is that the logical conclusion that can be drawn? Almost all of the remote engineers I know have successfully negotiated keeping their same salary (despite all of this hubbub about lower salaries elsewhere). Where is all of this hidden world-class engineering talent? I'm from the Midwest and could count on fingers how many people from my hometown even knew what C++ was. Out of all of those fortunate people, only one of them still lives there.
Can you imagine any American company contending with the Chinese government for hiring remote workers (let alone risking infosec -- the other top article on HN today is about a Chinese company breeching a US competitor)?
Can you imagine any IIT-caliber engineer wanting to work remote instead of move to the US? My Indian-American colleagues have described the abject starvation and poverty at home to me. I've also seen it myself first hand while traveling.
South Korean engineers have close-knit online communities for moving to the US for work in Silicon Valley (there's even a Korean government agency to facilitate this).
Pockets of talented engineers have also existed in Poland, Russia, Belarus, and Ukraine as well (look at the IOI rankings), but timezones make these remote workers hardly manageable. My previous company was almost entirely staffed from Eastern European immigrants who happily packed their bags and booked one way plane tickets to SFO. Those people have been through multiple periods of history aptly described as none other than sheer hell, with the literal climate to boot (I.e. hath frozen over).
Outside of these countries, you're no longer hiring the best of the best. Talent is still scarce, and nations that have the government, culture, population, and resources to foster it are numbered. If I had to guess, every single person I worked with while I was at FAANG had a 150+ IQ (top 0.1%ile). Many had PhDs (we called them "research scientists") or Ivy League caliber degrees.