Very good comment which applies to many console apps. I did this with Vim, the only custom key is 'jk' instead of <Esc>. But Vim has really good and sensible defaults. But tmux' % and " (for vertical and horizontal splits) are so counterintuitive, I kept them but still after many years, I still have to think a millisecond every time which of them to press and on top you need to press Shift as well which makes it even more cumbersome.