Probably the latter. Slightly differing UIs are not interesting enough for your brain to activate problem solving and learning. But they are different enough f

Probably the latter. Slightly differing UIs are not interesting enough for your brain to activate problem solving and learning. But they are different enough for you to get slightly confused in minor ways. I think that’s why some people streamline their UIs as much as possible: vim/emacs/terminal everything, same bindings everywhere etc. all optimized for muscle memory and comfort.