[ghaff]

Many demographics were moving out of American cities through at least the mid-90s. A city like Boston was losing population until that time. The influx of, especially, college-educated young people is fairly recent. There's no particular reason to think it has to continue.

I know a bunch of people who were in urban apartments who have moved to larger places a number of hours out. There's a huge spike in real estate prices outside of cities now.