My girls share a room.
I have spare rooms but I dont want them to be encouraged to be alone in their rooms.
I like it for so many reasons.
Their room is for sleeping. Not going in and closing the door.
There are other places to go to get space.
Ds's room is right beside my room.
My girls will share till dd1 goes to high school, at least.
In the past most people had smaller houses and children shared. They got through puberty fine.
girls in boarding school seem to cope!.
Its only in the past 10 years that we have created this need for child space. To give them alone time. But most kids seem to be fine with sharing and space can be found by going outside, in to the study or lying on the couch with a book.