Yes, you are a little bit limmited sometimes because of the lack of generics and the like, but at the same time, if you learn to use Go interfaces well, you end up using them most of the time happily. The parallelism primitives are great too.

As much as I love complex type systems, pattern matching, algebraic data types etc., I know that if Go had those things, it wouldn't be the language I love to write everyday anymore.

Somehow, Go is a really practical language and you end up being very productive in it, at least from my experience.

Saying that people who write Go should be stupid is shallow thinking. Complex languages aren't the only complexity that you should have. Some people concentrate on sophisticated architectural design (like Kubernetes).

There is one thing in Go, that I haven't met anywhere else. I can really understand any codebase I stumble upon in a matter of seconds. This is a huge boon to productivity.

Anyways, I never had any problems switching between Go and languages like F# or Scala on a daily basis. Rust looks interesting, though I think it will end up being too complex for a lot of people to understand, which will hinder its growth.