Say what?
Golang is being used in many production environments.
It is not a research project anymore, and that has been the case since a couple years ago or more.
Google is using it in several prod environments. Other companies (the one I’m currently working right now is using it for a high performance, high reliability) http server.
I would say, the only drawback so far is that Golang needs gdb to be debugged properly, so if you don’t have a tool that uses gdb, like VS, then you pretty much can’t debug it.