There are open source text editors of all levels of "easy to grasp". I've contributed to one myself. With Atom I simply don't have the option, and that's unacceptable as a professional in this craft.
I agree, I'm just saying that if some capable people decide to stop working on Emacs, it would die. So sometimes I prefer a paid product because there is incentive to continue working on it. (Ok, not that the karma/love one gets for working on Emacs isn't good enough).
Vim is available on all (relevant) operating systems.
Vim doesn't require an invite.
Not for me. I do like to give new editors a try (fell deeply in love with LightTable just a short while ago), but OS X as main platform and yet another closed editor?