There's another application for this besides mocking: static REST routes.<p>For example, imagine if all github pages had this enabled. Then, by writing the appropriate files, you could provide a REST interface to static assets in an interesting way.<p>I can't quite, at the moment, come up with anything I would actually USE this for, but it would be quite neat.
I was just writing some dumb hardcoded json mock code here and wondering when my IIS-powered colleague will be available for us to test and implement the proper requests. Then this comes in and allows me code an almost production-ready frontend all by myself on my Microsoftless linux box--which I'll be doing right away.