That's difficult. Living standards are much higher than they used to be. Should they be restored as actual usable apartments? If so you're going to think about

That's difficult. Living standards are much higher than they used to be. Should they be restored as actual usable apartments? If so you're going to think about the heating, cooling, the insulation etc. etc. etc. Should they be restored as historical exhibit? OK, sure. But then the space isn't really being used. IMO these are interesting but they're not such an important part of history that they must be preserved exactly the way they are today.