While I agree this is the ideal, it's often hard to be newcomer-friendly while keeping a stable interface (absolutely needed to build a muscle memory). You can

While I agree this is the ideal, it's often hard to be newcomer-friendly while keeping a stable interface (absolutely needed to build a muscle memory). You can reduce the feature set, but then it doesn't work for power users. An example of this is that new users often expect conventions they're used to; and both vim and emacs predate a lot of these, like Ctrl-S for saving. Muscle memory can also be a sign for poorly designed software, where simple actions require a lot of repetitive steps. At least, it's easy to go fast with a keyboard. As an example, I learned by heart some sub-sub-menu items in Cadence, accessed by Alt+x,y,z (I'm thankful for these underlined letters in toolbars).