Vim is sort of like C++: everyone knows their little subset of it, and everyone knows a different subset. It's common to watch another Vim user do something and

Vim is sort of like C++: everyone knows their little subset of it, and everyone knows a different subset. It's common to watch another Vim user do something and be like, "how did you do that!?!?". And it's in their muscle memory, not their conscious memory: they need to repeat it and watch which keys they hit.