The Moscow City complex has residential apartments (apartments), the towers have medical centers, a gym, a restaurant, ATMs, etc. And so I think those who live there may not leave their homes for years and only improve their lives by doing this. It's another matter if you sit at the computer for days and eat pasta. Lifestyle can be maintained poorly on the street and well at home.
It all depends on the lifestyle inside the walls. If you drink vodka or slightly diluted alcohol, and have a snack on stocks of chips with a smoke, then in five days delirium tremens will begin, and an ambulance will be lucky down the street. If you get by with beer, and eat borsch, pilaf, sauerkraut, French cheeses, fish in batter, then you can stretch as much as you like. But such a life cannot be called quality. But if you drink wine, eat well, douche yourself with water, do gymnastics and yoga, then you can live a happy life without going anywhere.
There are many examples when people, after serving 20 years of imprisonment in solitary confinement, were released alive and even a little healthy.