The article on lwn pretty much nails it. The discoverability of features would be great. I have been used emacs for ~20 years and I had finally switched to VSCode after I was stuck for half an hour finding a way to type single-quote in org-mode. I had found a way first time in the past, but then I completely forgot how to do it and was forced to search again. (It something to do with locales, it is traditional for Russian to use < > and << >> quotes instead of ' and ", so someone made it default when LANG=ru_RU.UTF8, so one types ' but gets < or >. But how it was done? How to undo this damage to emacs? Now I cannot remember it one more time, but luckily I do not use emacs now so it doesn't matter anymore).