Sublime is nice, and easy to extend, but it only extends so far, while Emacs is infinitely extensible.
You can practically live in Emacs[1]; some things I wanted to do in Emacs were hard to pull off, but I'm yet to find something it can't do. And it does so for years.
Fashionable editors come and go, but Emacs forever stands; and if there is one thing I don't think I'll be able to ever do again, is learn another set of editor shortcuts. Those I used were drilled there ~10 years ago, and I don't think they'll ever come out.
Also, author seems to take great deal about changing the editor theme and icon. Why should you ever care about that, outside a screenshot contest?
Editor should look good by rendering a nice font at a size you find comfortable, highlighted in colors you find easy on the eyes. If you look at the chrome, well, you're not spending enough effort editing.
[1] I'm not the one to start wars. vi might be just as good, but I'm not going to learn it this side of the river Styx.