> I suspect most tiling WM users don't either.

Personally, I do want all windows to tile. Your comment has left me wondering what the preference is across tiling desktop users.

I don't think I _ever_ use floating windows for anything. Except pop-ups from applications that don't properly configure their pop-ups as such. My secret storage shows an overlay prompt to disclose permissions too. But that's also kind of a pop-up.