RubyMotion didn't support IB at all when it was released. Glad to see that's improved, but how does IB parse your code if its in Ruby?
Also, 'going back' to ObjC would mean a rewrite, not keeping around mountains of code you have to continue to maintain.
Hell, and even if you decided to go back to pure Obj-C, you could just run a `motion static` command on your project and then import it back into XCode as a library and go from there.
Seriously trolling, dude.