Emacs has amazing documentation. You can ask what a specific shortcut key does, you can ask what a specific lisp function does. Everything is linked together (

Emacs has amazing documentation. You can ask what a specific shortcut key does, you can ask what a specific lisp function does. Everything is linked together (so you can get from the shortcut to the function and vice versa) -- there's a direct link into code/implementation so you can traverse various levels of abstractions. When I contributed a module to melpa last year, the biggest back and forth was about documentation and description of what everything does. The doc system makes Emacs a joy to use and really makes it a stand out.