Disagree. You get 400k at FAANG when your base is 150k plus 20% bonus. Sure that bonus will go down to 10% but the rest of the 100k+ stock grant per year is not going to become 0. You would still end up with 225k which is still more than startups.
A burst bubble will kill pretty much every startup that can't get to profit with what they have in the bank right now. Raising will be next to impossible. You do not want to be at a startup if that happens.
I'm old enough to have seen the dot-com bubble and it's aftermath, and it wasn't pretty.
Facebook and Google and others make their money globally. They don't actually make a lot of money from Silicon Valley that's just where their workers are. I can't think of a more diversified, protected stream of income than one of the FANGs right now, even if the US has a recession, there are still countries around the world that will be doing better.
Their customers are diversified not only across product sectors, but across the globe. Unless internet traffic or engagement drops, which it hasn't yet and probably won't until a new technology replaces it, they don't need physical products to make the billions upon billions that they do.
It seems to me these high compensations started appearing right after Apple, Google et al got their hands slapped for colluding to hold down engineer salaries.
Its 400k while their stock price is crazy high. But If we really are in a tech bubble, that money is back to the typically 80-120k of most tech jobs.