Some friends were able to provide separate bedrooms to their sons last year. The older one already has a man-shaped face and body (still an adolescent voice and personality, but that's sometimes how that goes). I really couldn't believe it when I found out.

I grew up privileged and had my own space, but a shared space between siblings was normalized. But going into high school with that constraint, it seems stifling. I really have to wonder what effects that lack of privacy / autonomy has on a developing mind. There are probably studies but it's not something I'm about to research.