When people say 'learn Vim', are they talking about the core editing and commands, or the I'm'proved parts that make it Vim (over vi)? To learn 'vi' I had an 8

When people say 'learn Vim', are they talking about the core editing and commands, or the I'm'proved parts that make it Vim (over vi)? To learn 'vi' I had an 8.5 x 11 tri-fold cheetsheet that I printed out, pinned to the wall of my cubicle (yeah, it was a while ago) and referred to in constantly. Even when I wasn't editing, I'd take it down and browse up and down the columns to see what I knew/used that I hadn't before and recognize more stuff that made sense now when I had to memorize it without reason. Eventually you see how all the patterns fit together and how small it all is, wondering how you couldn't see it all from the start. As for the muscle memory. Just get over the hump. Another pro tip. If you were thinking about using a custom keyboard layout, sort that out, because vi(m) muscle memory has nothing to do with alphabetic letters. It would be more like a musical instrument with the scale keys shuffled nonsensically. Sadly I had shooting pains up the backs of my hands, switched layouts and typing words is back but my vim's still slow, rebuilding muscle memory, so I'm with you on that.