Because domes are a terrible shape for humans. You can't hang pictures on the walls - the curve makes weird things happen. Likewise your furniture can't be against the wall it must be out to account for the curve.
Domes look cool, so of course fiction is full of them. They are not impossible to build so a few people have built them. They are not a good shape though, so they won't catch on.
Right. They're impractical and a poor use of space. Also, it constrains how much of the space is walkable without bumping your head into the wall/ceiling. It's like living in an attic.
Domes look cool, so of course fiction is full of them. They are not impossible to build so a few people have built them. They are not a good shape though, so they won't catch on.