It seems to me like in big cities, as this article describes what eventually will happen is the rich will buy up the property because nobody else can afford it, service workers won't be able to actually live within a reasonable distance in order to work there, and the city will exist mainly for 1) wealthy professionals, 2) people who use real estate to park their money, and 3) tourists. Regular working-class folk disappear.

When one visits the city in the daytime, it seems like it has activity because of the tourists, but it has no real indigenous activity.

Perhaps that's the steady state, because there are enough tourists to keep the city going economically.