The beauty of go is YAGNI. Language design makes it much harder for people so do stupid and cute things.
During my design process if I start realizing that I’m missing maps, More expressive Types, Or more complex polymorphism. I ask myself if I really need those things.
If I really do. I move off of go.
That’s the beauty of the language. Go does not need more complicated language features because it’s can handle the majority of trivial software work without unnecessary complexity.
The language does not need to solve complicated problems.
Ok, and what if you realize you want these things a million lines in? Do you still move off of Go?
Generic programming isn’t some fancy research language feature like dependent types. It’s just a bare minimum feature in any modern typed language.
It’s perplexing that after C# and Java both notably shipped without generics initially then added them later that they decided to ship Go without generics.. only to end up adding them later.