[rectang]

> In your view, how is "interfaces with default implementations" different from "inheritance for code reuse"?

The latter is a more general classification?

A type which inherits a default method implementation from an interface is an example of "inheritance for code reuse".

A type which inherits a method implementation from a parent class under classical OOP is also an example of "inheritance for code reuse".

However, I argue that "interface inheritance with default implementations" is superior to "classical OOP" because it avoids tight coupling with memory layout, problems with implementing multiple inheritance in classical OOP, etc.