"Java, JavaScript (ECMAScript), Typescript, C#, C++, Hack (PHP), and more [...] actively borrow features from one another. They are converging into a single huge language." [0]
[0] https://www.dotconferences.com/2015/11/rob-pike-simplicity-i...
"The key point here is our programmers are Googlers, they're not researchers. They're typically fairly young, fresh out of school, probably learned Java, maybe learned C or C++, probably learned Python. They're not capable of understanding a brilliant language but we want to use them to be able to build good software. So, the language that we give them has to be easy for them to understand and easy to adopt."
https://channel9.msdn.com/Events/Lang-NEXT/Lang-NEXT-2014/Fr... at 20:33
Go just makes you productive by removing lots of things to think about. I'm not saying that generics should or shouldn't be part of v1, I'm just saying that go lacking features to make juniors more productive is a feature