Go doesn't have a standard library problem, it has a userland language problem.
* No sum types / algebraic data types in 2022.
* No exhaustive pattern matching in 2022
* No move semantics / Uses GC
* No borrow checker
* Still suffers from nil problem / No type-safe nil / No type-safe Optionals in 2022 -- (I can show you all the nil panics in kubernetes logs if you like)
Current go users are already sold so they don't expect more, and that's fine, but further evangelism will require a better host language.