Comments like the parent make me sad. It could be summed up as "node.js, damn hipsters." It's just another form of fanboyism, except negative.

There are not many good, scriptable editors for programmers. Actually, I would consider only 3 for serious use: Emacs, Vim and TextMate. Of these, only one has really good integration with OS X.

If I was considering switching editors, the language that is used to extend it would be one of the most important factors (I love Emacs, but Emacs Lisp is seriously broken). The fact that Kod uses node.js means two things:

1) It's JavaScript, so it's high level, has nice semantics and it's extremely popular;

2) It uses a reasonably fast dialect of JS, and has the necessary infrastructure, like CommonJS modules and access to the filesystem.

So, Node.js is the thing that makes this topic actually hacker-news-worthy.