There are literally 100s of text editors, so it really is more a matter of taste and preferences. However, to the best of my knowledge, emacs with eLisp is unlikely to be eclipsed on any of your points.
replies(1):
- More customizable than emacs
- more mature community and 'giants to stand on' (like packages)
- Stronger expected lifespan
- Realistic enough to actually commit to (not like, build the universe, build your OS from scratch)
I'd love to hear if there's anything you've found beyond the Mariana Trench! Will