This really didn't work for me. I found needing to parse the command ("Move backward a word") broke the memory that I have built up over 15 years of using Emacs. Instead of naturally moving backwards with a flick of the fingers, I had to concentrate on where each finger was and on the key I was pressing. I think the goal of this is great, but as it stands, I'm not convinced it is going to help. Given it aborted my na…
Further, I don't want to need muscle memory for editing! I would take the hard stand that any repetitive keystroke combinations inherently implies inefficiency - ie, an ideal editor should provide enough shortcuts to give your keystroke stream a fairly high entropy content. Maybe we're not there yet but I don't want to develop habits which would stand in the way of such an ideal.
The whole reason this tool exists is because the best text editors (Emacs ;)) do have a ton of different commands. So now you have to learn that when you wand to delete a word in front you use M-d.
The "muscle memory" is just associating each of the many discrete keystrokes with an action. So instead of thinking "hmm, I need to delete this word, I'll press M-d" your hands just go to M-d as soon as you realize the word needs to be deleted.
This is exactly the sort of memory you need to deal with a high-entropy command stream quickly. The ideal would be to use a ton of different commands without thinking about them at all.
Now, I don't think this site is ideal for this sort of learning, but it's a step in the right direction.