Storage units are BIG business now.
I was pondering this the other day. I think it is that housing is so expensive so young adults can’t afford big places. But - they are used to having all of the stuff and toys they had when they lived at home with mom and dad.
Although even with the “normal” amount of stuff it is difficult now. My son just found a new apartment. He used to have an 8-foot long closet for his clothes and other stuff - now it is 4 feet!
Garages used as storage in California while the expensive car sits outside waiting to get the catalytic convertor or the car itself stolen.