The only thing holding me back is the lack of an integrated terminal. This is absolutely essential to my *nix workflow and I can't for the life of me imagine a reason to not include it. Otherwise, I love what I'm seeing here.
Well, most editors and even IDEs don't offer one.
>and I can't for the life of me imagine a reason to not include it.
The reason being that terminal semantics are hell difficult to implement, and doubly so in a web-based stack?