The nice thing about MD is that it's a spec, separate from impls. If I were to use this, I'd want to install a node.js lib that renders it to HTML and has a plugin API for features you didn't think of but that I need and know how to implement myself. So I wouldn't tout the built-in-ssg as a feature, more of an ad hoc spec like perl markdown originally was.

Also I commented with some feedback in another part of this post.