I would like to see more internal Google stats as well but-
"and from what I can see, the language is hardly every used outside Google as well."
3 Months ago Go was more popular on github by number of unique committers than Lua, Clojure, Haskell, Erlang, D, OCaml, Lisp/Scheme, Rust, Delphi, Prolog, F#, Ada etc [1]. Surely you consider some of those languages as being relevant? That is not a perfect metric, but those stats don't fit your narrative of Go being unused very well.
>3 Months ago Go was more popular on github by number of unique committers than Lua, Clojure, Haskell, Erlang, D, OCaml, Lisp/Scheme, Rust, Delphi, Prolog, F#, Ada etc [1]. Surely you consider some of those languages as being relevant?
No, none of them is really relevant industry-wise at this point. That doesn't preclude them being excellent languages, used in a lot of projects, but the "a lot" for Haskell and even Clojure is some orders of magnitude less than the "a lot" for Java, C, VB, etc.
The listing has Java and Ruby head-to-head which is not at all the case, not even close, in programming at large. It's just that Ruby is more popular with the GitHub using type of people, whereas tons of enterprise programmers using Java can never put their source up there for all.
(The same listing has VimL and Emacs Lisp above of Go -- I guess people merely storing their Emacs configuration on GitHub are probably counted as programmers doing actual development work).
"and from what I can see, the language is hardly every used outside Google as well."
3 Months ago Go was more popular on github by number of unique committers than Lua, Clojure, Haskell, Erlang, D, OCaml, Lisp/Scheme, Rust, Delphi, Prolog, F#, Ada etc [1]. Surely you consider some of those languages as being relevant? That is not a perfect metric, but those stats don't fit your narrative of Go being unused very well.
1: https://gist.github.com/igrigorik/4440674