But there's a huge uphill battle ahead for Go here. For instance, I write C++ code because I'm doing music software and all the APIs and existing code libraries and samples are in C++. It's just so much easier in this environment to put up with C++'s warts than it would be to try to shoehorn Go in there. As John Carmack says, externalities can quickly overwhelm the advantages of any particular language.

But if you're implementing web services from scratch you don't have any of that baggage to carry around so it's much easier to choose Go.