[drzaiusx11]

I'd agree that lack of eval is "for the best", but lacking threads and mutexes isn't. Lack of define_method makes a lot of sense as well given the use case.

However, send/method_missing is in common use in preexisting libraries and it shouldn't be particularly difficult to implement (via in memory lookup tables at "compile" (to c) time etc), so either they're ommitted for the reasons you say, or he just hasn't gotten around to it yet. I'm hoping the latter, but only for compatibility sake as I won't be able to use it for any real work at least in the short term otherwise.