e.g. the primitive vs. object distinction, the lack of closures (gcd is a poor replacement) and the way they allow a rethink of control flow, the neat things you can do because the stack is an object (restart exceptions with values! coroutines!)

I'm fine with the compromise, I just wish it was different.

I had hopes that MacRuby would turn into a supported systems programming language, but it's not to be.