Every long-term Meta employee that I know has had their lifestyle grow to match their means and isn't any closer to their retirement than when they started. And in my circles we're talking people who've been there mostly in the 5-12 year range.

In truth I really know just one retired FAANG engineer who put 12 years in at Microsoft until he was put on a team with a bad manager who had it out for him and stack ranked him out of the company. He's been happily working on side projects in the few years since that and sitting on his millions. It also doesn't hurt that his wife is also a Microsoft employee and is still there.

Also I don't know if you've seen Meta offers in the last year or so since their layoffs but they've been absolutely lowballing the shit out of everyone they can justify doing so to.