Comment by matsemann

I live in a modern apartment in Norway (2019). I guess some of our heat insulation demands make it so that we get extra thick walls and floors, but I've never heard any noise from neighbors. No tv sounds, no stamping feet etc. Maybe twice a year someone drills a hole to mount something on the walls and I hear that for a few minutes. Even have a train passing by outside I can't hear with the windows closed.

Point being that it depends.

Edit: modern fire safety also dictates a bit how contained each unit should be, I guess.