As usual I manage to send birthday cards a day or two late. Go was three years old yesterday. This last year saw the release of Go 1, a solid version.
For what is a pretty new programming language, it has being taken up pretty extensively by BBC Worldwide, Canonical, CloudFlare, Heroku, Novartis, SoundCloud, SmugMug, StatHat, Tinkercad, Atlassian, Bitly and others, not to forget Google who use it themslves.
It's still lurking just outside the top 50 programming languages, according to the Tiobe Index and Objective-C seems to be soaring at the expense of both C++ and C#. But it's a strong language and I expect it to become more popular.
- Link to Go Programming Tutorial One