Code readability is another, correlating one, but this is more subjective. To me go scores pretty low here - code flow would be readable were it not for the huge amount of noise you get from error "handling" (it is mostly just syntactic ceremony, often failing to properly handle the error case, and people are desensitized to these blocks so code review are more likely to miss these).
For function signatures, they made it terser - in my subjective opinion - at the expense of readability. There were two very mainstream schools of thought with relation to type signature syntax, `type ident` and `ident : type`. Go opted for a third one that is unfamiliar to both bases, while not even having the benefits of the second syntax (e.g. easy type syntax, subjective but that : helps the eye "pattern match" these expressions).
Meanwhile Go will have some boilerplate at every single level
Errors as values can be made ergonomic, there is the FP-heavy monadic solution with `do`, or just some macro like Rust. Go has none of these.
You don’t have to hate Go to agree that Rust’s `?` operator is much nicer when all you want to do is propagate the error.
