If they're arriving in a city that's already unbearably expensive, and it up doing normal life things (coupling, planning for kids), they might end up leaving back to either that Rust Belt city, that might have a 'revitalized' downtown (microbrewery, craft coffee shop, pricey ice cream place) or two one of the burgeoning smaller cities that has better amenities than the Rust Belt one (Portland, Austin).

Then there are forgotten cities, that have good employment and affordable housing, but aren't as sexy such as Minneapolis, Raleigh-Durham, maybe even Chicago.

I'm currently in LA and the exodus is real. It sucks for people that grew up here since the wages aren't great in most jobs, housing is out of reach, and they want to be around their family.