I think it's hard to use FAANGs for general trends like this. Google for example in part hires people to keep them from going elsewhere or building a competing company. One of Google's big perks to lure these people is all of the onsite amenities. Google and the other big tech companies are unique in a lot of ways, and in no way represent the average company in the US or even in tech though.

What will be interesting is if WFH (I like to say Freedom of Work) continues to take hold, will companies like Google have to adjust or be ok missing out on employees?