I've thought about this a lot, on account of infinite people having an insane amount of trouble just keeping consistent shelter over their heads. My gal had suggested this as a means for the homeless. I know that right now malls are being lent out to many individual small organizations (namely churches as far as I know it). But I am not sure this is sustainable as a whole. Due to maintenance costs, hazardous situations like mold and lack of privacy.
I also think about how people keep saying cost of living is why people aren't having kids. But I have lived in multiple places that were once a much larger living space that had been jankily peacemealed into several much smaller apartments. I am a human that enjoys having space of my own, even if it's micro in nature. I can't imagine I am alone in that. And I don't believe people will want to further invest in divvying up spaces in malls. At least, unless they're getting kickbacks. And they'll probably do it in the worst of ways. Leading to spaces that will be barely sound and fast to degrade but slow to fix. I mean shelter is super duper important. But I swear to god your surroundings can affect your mental state. And when you're wedged together in a decaying mold filled building with a bunch of aging individuals facing a slew of different health-issues it'll probably deteriorate your wellness faster than if we tore the places down and utilized some sort of cheap eco-friendly building material/robo-builder to assist making healthier homes.
Also mind you, I don't think we're gunna have beautiful low-income or middle-income homes if the greige, vinyl, orange-peel, chrome take-over points towards anything.