Sims 2's system was much more versatile. As long as you put the door and walled/fenced everything properly, you could build whatever structure you wanted and call it an apartment complex. Prisons, cruise ships, castles, nomad camps (using the room seperators as walls and camoflaging the apartment door with shrubbery, at least from certain angles)... anything. I'm not a builder, so my designs never looked great, but I made them at least convincing and fully functionable.
Now Sims 4 limits me to actual, literal apartments in a city. That's beyond boring and a waste of what used to be a powerful feature.
