Important point: this is Google's use of Go, not your use of Go. Take note to check whether their results are applicable to you before adding it to your repertoire of "reasons we should use Go at our company".
Go is at my employer's (one of the top 3 car companies world wide) techradar the number one to adopt. New stuff of all kind is done in Go.
So, Go is a huge success outside of Google as well.
Not saying that I'm of any importance for Go, but I'm using Go for personal projects, at work for CLIs and standard backend stuff (APIs + DB, Redis, etc.) with great success.
But to be clear: I'm saying that reading about other people's experiences with a language (including yours here) is useful in making your own decisions, but you must also account for how you and your usecase are different than the one that was presented.
Link from the article
Honestly, it's not breaking news that Go is used heavily outside Google.
Click on the link about the "sixteen case studies" and you'll see the rest.