I've always thought ‘multi-document interfaces’ as we used to call them are an anti-pattern. I have a perfectly good window manager; why does every app need its own incompatible, usually inferior window manager built in?
(Mind you on mobile I very much don't have a perfectly good window manager, and indeed can't even open multiple instances of most apps…)
(Mind you on mobile I very much don't have a perfectly good window manager, and indeed can't even open multiple instances of most apps…)