Java 1.0 was in '96. I had remembered it as being more like '98, which was why I said 00s and not 90s—1998 felt a bit late to really be "90s" for me. I wouldn'

Java 1.0 was in '96. I had remembered it as being more like '98, which was why I said 00s and not 90s—1998 felt a bit late to really be "90s" for me. I wouldn't really call abstract classes interfaces. They're a way to spread behaviour across an inheritance hierarchy, but a fully abstract class doesn't do anything. Python is duck-typed; inheriting from a fully-abstract class is a no-op unless you're doing something metaprogrammy.