Funny article! Yes, OO as defined by Alan Kay was about the interface, protocol or what ever we call it in a given language. It's a tool for abstraction, so yo

Funny article! Yes, OO as defined by Alan Kay was about the interface, protocol or what ever we call it in a given language. It's a tool for abstraction, so you think about communicating instead of structure and state. Now, most modern (~10y/o) general purpose languages I know have moved away from ADTs or simply inheritance. Inheritance was just a means to an end and never the point.