One of the most successful languages created in the 21st century is Go. It doesn’t have a construct called “class,” but you can build types that are structs of encapsulated fields and you can attach methods to those structs. Go allows the definition of interfaces that are checked by the compiler using structural typing, a.k.a. static duck typing—very similar to what we now have with protocol types since Python 3.8. Go has special syntax for building types and interfaces by composition, but it does not support inheritance—not even among interfaces.
