I really like this, it's a bit hardcore, but for someone that really cares about efficiency (whether it is worth it or not - debatable), this is great.

Though I have one minor nit against one point, that I've seen basically in every similar article:

> This means no arrow keys and no mouse

I use Neovim daily, and there is no denying that 98% of the time, using mouse is less efficient than doing a fancy search or jump. But for the remaining 2%, it's provably true that mouse is better - like, selecting an arbitrary block of code (without {} or any keyword to hang on). So I always recommend leaving the mouse enabled. Just use it when it makes sense.

How using a mouse and incurring a context switch is better than just mashing j/k a couple of times in worst case scenario?