[gtrevorjay]

Yeah, I was introduced to the Twiddler in the context of robot interfaces and while I can't find the study now, there were a couple showing that eventually the slowdown is down to the extra movement, which is almost exactly x3 on most chorded systems.

I use the mouse almost exclusively now, to the point going back to search/word/character navigation when a terminal won't pass mouse events feels excruciating.

Macros are mostly code refactoring in emacs. Things like moving blocks between brackets, repainting, stuff like that. These really benefit from sticky keys. No letter is closer or further from super, hyper, or alt because I hit the chord for the meta key and then the one for letter.