> but it's very easy to incorporate.

As someone who is adding this to a Go project with hundreds of unchecked errors, I disagree.

What kind of error does it check?

It is dealbreaking. These days I gravitate more and more towards strongly statically typed languages over weakly dynamically typed ones, which I definitely used to use when younger. Fact is, linters are simply not the same as something built-in from the ground up. Trust me, I have written many thousands of lines of Python and Ruby, and even with linters, they don't hold a candle to even something like TypeScript in terms of type ergonomics and refactorability, not to mention even stronger languages like Haskell or OCaml.

Anecdotally this is the same argument many C++ devs make in regards to Rust safety guarantees. The difference is just...different.