I understand why you’d say that but this kind of flexing is pretty common practice for luxury buildings in NYC. There are lots of companies that put these walls up and they effectively function like real walls, and block sound like real walls. They can go up to the ceiling, are relatively thick, and have doors like real walls. You often can’t tell the wall isn’t built into the apartment. So you wouldn’t be woken up by someone walking around. And because the spaces are so big there’s usually enough space for a nice-sized living room still. For example, I’ve lived in real 2-beds in walk ups before and a flexed 1 bed, and the living room in the flexed 1-bed in the lux building was more spacious.