Maybe if Valve could work out shipping them to other regions officially we'd see more growth. I still see people lamenting that they can't buy a Deck without going to some sketchy third-party and overpaying.
I built a new PC with the intention of adding a second drive for Windows. It's been two weeks of gaming and I haven't gotten around to it yet. Might never.
I would it is a higher percentage compared to the population that does not have a steam deck. Still a majority of Steam Deck + Windows PC owners though.