I feel like the phenomenon of people in their twenties living with their parents should only be attributed to deep cultural currents after we're 100% sure that

I feel like the phenomenon of people in their twenties living with their parents should only be attributed to deep cultural currents after we're 100% sure that it's not the exploding cost of housing in the most productive, well-paying metropolitan areas (which also happen to be the most fun places for a young adult to live).