"A room with four feet of water was built to last for several years with the intention of being more generalizable to the general population; but with each new room under its original design the old room is no longer suitable for real life use. So why do we keep asking the older room owners to build a new room with four feet of water?

"It doesn't provide a room with many plots that have no walls in it? They aren't as useful."

Is it that hard to design a house with multiple plots over it?