Given the choice between a (objectively) theoretically superior language like Haskell or Rust , and a language that prioritises developer ergonomics at the expense of PL research, I'll take the ergonomics thanks.

We have a 1MM line c++ codebase at work, a rust third party dependency, and a go service that's about as big as the rust dependency. Building the Rust app takes almost as long as the c++ app. Meanwhile, our go service is cloned, built, tested and deployed in under 5 minutes.

And yet it's a productive language with significant adoption, go figure.

They made trade-offs and are conservative about refining the language; that cuts both ways but works well for a lot of people.

The Go team does seem to care about improving it and for many that use it, it keeps getting better. Perhaps it doesn't happen at the pace people want but they always have other options.