Debian allows you to install ruby MRI and jruby simultaneously.
Recommending RVM for production use is hilarious.
Recommending debian-ruby for production use is bordering on physical injury.
> Recommending RVM for production use is hilarious.
That's a pretty inflammatory, unsubstantiated opinion. Any reason?
1. Gemset isolation comes in handy.
2. Sometimes you want to have multiple ruby versions (e.g. MRI for app and JRuby for memory heavy script)