Keyboard control schemes annoy me a lot, because most of them can be described as "draft of a potentially good idea that became holy book and engineering was forgotten".

For example - let's put "go all the way to the right" on the left button. And "go all the way to the left on the combo of modifier with right button". I'm talking about 0 and $ (Shift+4) for vi. It's not consistent, it's not ergonomic or easy to input when properly touch typing. It's almost an accidental control scheme because it was based on no longer existing keyboard keycap labels. And in this case where you can't even exit vi without first reading a manual, half an hour reduction in learning time that you get from remembering that `i` is Insert will not compensate for hundreds or thousands hours using later when you will be pressing button not by looking at keyboard but by muscle memory.