The big problem with Erlang is that none of the language designers actually really appreciate functional programming. Erlang is pretty hard to use functionally. The syntax is surprisingly heavy and the APIs are not very composable.
Fantastic article, and this one too: http://www.jerf.org/iri/post/2930.
There is lots to learn from the decades of Erlang experiences and it’s great to consider how that experience can be applied to Go.