What do you mean when you say “Go’s usecases did not exist”? It was invented to write concurrent servers in that would have readable, performant implementations suitable for use across teams, to make code review faster and better, to displace C++, and to prove that certain design principles from Dis / Plan9 were superior to those in Java. I’m not really clear how those usecases did not exist at the time. If you mean “Go is for scheduling containers”, you are wrong, but just because one popular application exists that doesn’t imply that is “what it’s for”.