There are plenty of folks, especially on the technical side, that are here for the interesting work and high salaries. They could care less about climbing the managerial ladder. Also, millennials are starting to hit the mid-career phase, where it becomes clear that the 'ladder' gets really narrow, and things like children and mortgages start to weigh heavily on life choices. There will be plenty of folks who stick around, for sure. But by all indications (surveys, anecdotal reports, rent prices, etc...), there is plenty of interest in remote work.