The same could be said about non-QWERTY keyboard layouts but I think the potential gains from using the best tools you can are so big that you'd have to be usin

The same could be said about non-QWERTY keyboard layouts but I think the potential gains from using the best tools you can are so big that you'd have to be using shells where you're unable to customize a substantial amount to end up at a productivity deficit. I find that I mostly use systems that I can make match my setup...