I'm pretty effective with vim, so much that other 'normal' editors like sublime & other modern gui editors make me feel a little crippled. That is a problem, because you need to be flexible about things in life. Has anyone succeeded in deliberately changing editors, even when not feeling like it's necessary? I'm especially curious how I could start using emacs, and actually get up to speed with it instead of using it…
I used to use Textmate at the University. Then XCode at my first job. Then I learned Vim, since every hacker in the internet seemed to love it, the usual story... (big plus: many IDEs have very good Vim key bindings)
Then I simply wanted to know what Emacs would be like. I took a bit of a productivity hit for about a week or two, but not more. Over the next year or so I read the Emacs manual and dove deeply down the rabbit hole. It has been four years now. Somewhere along the way I picked up enough elisp to be dangerous.
TL;DR: Want to learn a new editor? Just do it. There's no magic to it. Do the tutorial, RTFM, take the short-term productivity hit.