I wouldn't jump ship to a Go project, but I am currently in the situation you fled from. Even the core team who started the project doesn't have command of the language. I have some experience with rust and Haskell (hobby) and JVM experience with Java and clojure so I can get by but it is not pleasant.

I think the situation is similar to c++ where too many features have been added over time.

While with c++ there is a body of compiled recommendations on what not to use and how to write c++, for scala that doesn't really exist.