I can't find the original announcement, but I found the accepted Go proposal: https://github.com/golang/go/issues/24543

I remember that being the straw that made me drop Elixir (which I love, to be clear). Go excels in many, many places where Elixir does, but it's way faster.

I do think Elixir has immutability on their side, which is huge for new developers, but there are way less developers in Elixir than Go, so the end result doesn't change unfortunately.