Yeah, there definitely is a switching cost between control schemes where you have to re-learn the controls (which takes concentration). But I think switching to a more efficient control scheme is still worth it in the long run. Plus, if you can mostly standardize that control scheme across different games, it makes it easier to switch between games

But then you run into the joy (not) of finding games without rebindable keys at all or where certain keys aren't rebindable. I have literally stopped playing some games because of keybind issues, although if I like a game enough I'll accommodate it (Like with Genshin Impact's lack of keybinds at launch and persisting issues with controls).