every time the idea of non-ASCII usernames and identifiers comes up, I see a bunch of english speakers talking about how terrible it is that so many systems limit usernames to ASCII and that it's an equitably problem for diverse userbases, and then I look over at actual CJK systems and communities and they all use ASCII for identifiers, and absolutely nobody uses the non-ASCII name support that *does* exist (eg IDN domains) because the UX is intrinsically awful