People ask me why on Earth would I subject myself to such dreadful text editor as vim. With it’s weird mode system, nonstandard keyboard shortcuts and all kinds of strange quirks it is not what you would call a user-friendly piece of software. Most users new to this particular editor hit a brick wall at step one: entering text. When you open vim and try to type into it will do strange things. It will mostly beep at you, or display some messages in the status bar but not type. Unless of course you happen to hit a vovel lie a or i or o, in which case it will suddenly come alive and let you type.
Years ago I have found this little illustration that perfectly describes learning difficulty curves for various common text editors: