Imagine apartments built into what used to be department stores, (Oh, you’re JC Penny 203? I’m at Sears 106). Get those old arcades up and running. Set up meal stations at the food court. Once people actually live there, stores will start to move back in.
If I’m unable to finish my life in my own home, that doesn’t sound like a terrible option.
Maybe 10 or so years ago, was a real push to convert old malls into apartments or low income housing. Turns out it’s not that easy. Those buildings were built with minimal plumbing, just a few public restrooms and limited water service for the food court. There’s just not enough water/sewer to supply more than a small handful of apartments. You’d have to tear up significant portions of the building to run all new plumbing for all the kitchens & bathrooms. And that assumes the underlying city infrastructure that runs to the mall could even support the new water & sewage demands in the first place.
I’ll grant you, it is a cool idea. It’s just not nearly as simple as it sounds.