I can see how that's ambiguous. I mean this in a totally good way. Moving to a new implementation of a language interpreter should not have any exciting surpris

I can see how that's ambiguous. I mean this in a totally good way. Moving to a new implementation of a language interpreter should not have any exciting surprises, it should just behave in the same way as any other implementation. JRuby succeeds remarkably well in working exactly as the MRI implementation. Therefore I consider "boring" to be high praise. What's exciting is what it enables, which is real threading and java integration. But that's another story, and I do intend to write a blog post on it soon.