Earlier quoted context omitted.
A sure sign of a well designed tool imo
Really? IMO that's the sign of an extremely poorly designed tool that a lot of users have learned to use very well despite how poorly it's designed. A tool that's designed well should have its actions all extremely intuitive, in which case one would not forget things in this manner because all of the actions would be derivable from their justifications. For example: ctrl+C is copy, and ctrl+V is the key right next to…
That works in English on a QWERTY keyboard. Maybe not in other languages, and while it can be explained, it doesn't necessarily help to recall. I remember my father coming up with mnemonics to remember Ctrl-V.