I know people in non-engineering, non-sales roles (e.g. recruiting and HR) at large tech cos buying 3rd houses in the Bay Area because their RSUs have appreciated so much so they're diversifying. It's absolutely insane how much wealth is being generated by the stock price run-up.
Just a new grad thread from Reddit:
https://www.reddit.com/r/cscareerquestions/comments/m635u7/o...
Anecdotally, my friend who just closed on their 3rd house runs engineering recruiting for a large public Bay Area company (and used to run their new grad hiring) so they've told me specifically what that company pays for grads of their target schools which they've obviously honed based on competing offers from other tech companies.
The more correct summary of the situation is, "some are not, but many are."