[okhobb]

I generally prefer keeping all the configuration in as few languages as possible and preferably in a single language. Adding filesystem-based config where a config option object in the main language of javascript would suffice goes against that.

Also, given a filesystem config, now I'm forced to have many very small files around for each route where each file is most likely just a call to another service handler. I'd prefer to mash most into bigger files that handle related but distinct routes.

Less important, but comes up, it's nice to be able to match routes based on code and not just string equality ... e.g. everyone seems to like having routes for usernames start with '@'