I appreciate RVM and Wayne offers fantastic, other-worldly support. That said, there's always room for alternatives and I'm intrigued by rbenv. The part that gives me pause is the need to run `rbenv rehash` after installing a ruby (not so bad and possibly fixable if the aforementioned change to ruby-build is made) or after installing a gem that has binaries (I predict I will forget to do this a ton).

I could definitely see myself wanting to override `gem` in order to detect binary installations and automatically rehash. At which point, it's not so unobtrusive!

Still interested enough to try it out and see if that is as much of a hassle as I think it will be.