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.
The idea of apartments centered around a grocery plaza has been a thing for a while. It’s almost an answer, except it still requires transportation to everything else. Plus the stores tend to be higher prices to support the cost of property and because they can.
Add a metro station, a large parking garage, should work