[themartorana]

"It's not very widely used."

Um. Well ok, maybe but not likely, as pointed out by a sibling comment, but it is used by a large fraction of companies that deal with services on an enormous scale - Google (obvi), Dropbox, Cloudflare... here, better than copy/paste: https://github.com/golang/go/wiki/GoUsers

You're going to recognize an awful lot of those companies.

Edit: not sure if it counts, but the number of companies using software written in Go in mission-critical ops is enormous (see: Docker).