>but there I still think using the keyboard for motion is more efficient once you build up the muscle memory for it.

I think a lot of people underestimate how fast a good trackpad can be with practice. I can move the pointer to an arbitrary location on screen in less time than it typically takes me to make a key chord. However long and hard I might train on Vim (and I did use it for ~10 years!) there's a hard limit on how much time that could save me when the trackpad is already so damn fast.