Exactly right. Yes and: > ...makes the whole experience of using your computer feel much easier and more pleasant... IIRC, the (mostly insufferable) NNGroup

Exactly right. Yes and: > ...makes the whole experience of using your computer feel much easier and more pleasant... IIRC, the (mostly insufferable) NNGroup determined the feeling of speeding up when using keyboard shortcuts (vs mousing) was mostly an illusion (at least for WIMP UIs). And to your point, if keyboard (or whatever) helps gain and maintain flow state, I'd score that a win. (Further, is a placebo that works, even when you know it's just a placebo, still a placebo? Hmmm.)