I strongly agree with this. I'll also note that "enums" solves for nil (universal or otherwise). > I have a feeling generics will be used for all sorts of situ

I strongly agree with this. I'll also note that "enums" solves for nil (universal or otherwise). > I have a feeling generics will be used for all sorts of situations that could be better handled with interfaces. Very much agree. I'll also extend "interfaces" to include closures.