Intergenerational housing is the historical norm. It seems the 20th century was a flash in the pan, if income and wealth inequality on top of social changes have led us here. Do the wealthy care about this and declining birth rates due to lower resources and strained youth? They control policy and there's no policy promoting improvements on this front except from optimistic primary candidates.

I just don't see this changing. I'm 30 and over half of my friends spent at least 2 years at home in their 20s. Every single time the issue was finances, they needed cheap digs as their debt and low income disallowed renting.