> Aren't Go structs subtypes of every interface they conform to? No. There's a defined coercion between values and interface types, which is not the same thing

> Aren't Go structs subtypes of every interface they conform to? No. There's a defined coercion between values and interface types, which is not the same thing as subtyping. This affects the semantics: for example, you can't pass a value of type []MyStruct to a function taking []interface{}.