We discussed having @bill change to @tozier, but when I try Discourse tells me:
If you change your username, all prior quotes of your posts and @name mentions will be broken. Are you absolutely sure you want to?
It’s not completely clear if they’ll be orphaned or broken-but-reconnected properly. Fearing the former, which also seems likely because the latter would be harder, I said “no.”
Possibly @vgabruzzo will know if I’m wrong about this or if there’s a quick fix.