I love the edit markers in the last screenshot. But too skeptical about the performance of a text editor running in webkit. All of my experiences writing text online have been bad. So the jump into using webkit for an entire dev environment fills me with dread.
Brackets[1] is a decent programmer's text editor developed by Adobe and using WebKit. It works fine. The performance and polish of web editor components like CodeMirror has come on a long way in the past couple of years.
Have you used LightTable? It's quite fast as the editor. I'm sure Atom is similarly fast. It doesn't run in the browser; it just uses WebKit as the engine.
Yeah, as the create of GitGutter for ST, my first thought was, cool if I switch to this I can write GitGutter in CoffeeScript. Then I thought, being Github, they would probably bake that in.
To put "often" in context, I raised a Github issue on it today which was resolved within a few hours, it's improving incredibly quickly (and it's already awesome).
