To me, Go feels condescending to write without generics. I may just not groke the idioms - but putting users in a walled garden that the standard library has the privileged to escape from (i.e. (Map<k, v>)) just seems to go too far in not trusting the programmer. The fact that generics have taken so many years - to still be talking about what [<( to use is beyond me.

There is a difference between becoming C++ and allowing programmers to make fundamental abstractions without interface{} hacks.