I had to break a lease on an apartment recently. The apartment was built in 2023 or 2024, marketed as a luxury apartment. We had no hot water for a month because they used a couple centralized tankless water heaters, and we happened to be the furthest away from the heaters - if they turned it too hot, it was burning hot for the apartments closer to it.

Not only that, but the walls/floors were paper thin. We could hear the floor creak when our upstairs neighbors so much as shifted their weight.