Depends what you mean by 'enums' exactly, but now that generics has been added, a small change would be to allow interfaces defined via type disjunction to be u

Depends what you mean by 'enums' exactly, but now that generics has been added, a small change would be to allow interfaces defined via type disjunction to be used as concrete types: type Option1 struct { ... } type Option2 struct { ... } type MyEnum interface { Option1 | Option2 } var myValue MyEnum // currently not legal Go That doesn't solve all the use cases for enums / sum types, but it would be useful.