I have to say, as time goes on, the more I like contracts. Go concrete types can satisfy go Interfaces. Go concrete types and Interfaces can satisfy contracts.

I have to say, as time goes on, the more I like contracts. Go concrete types can satisfy go Interfaces. Go concrete types and Interfaces can satisfy contracts. I would actually feel better if the proposed generics were a little less powerful. Composing generics can get ugly. This could be countered by community norms, however.