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.
Don't you love the feeling when your neighbor from upstairs seemingly plays bowling while horseback riding? (Especially when you found out that in reality he just dropped a penny on the floor that acts like a megaphone.)