> IIRC Rust wanted to take the same route like GO 
  > regarding interfaces and generics, but Niko made an 
  > argument that it is wrong turn to make.

This is a mistaken conception, as Rust has had something approximating generics since the very beginning (though they have changed drastically since the outset), and traits have always been explicit rather than implicit (and it was pcwalton who initially conceived traits, not nmatsakis (and traits as well have changed drastically since their inception (the bottom line is that pretty much everything about Rust has changed drastically since its inception))).