in Design Patterns (1994) by GoF, they state early on that “prioritising object composition over inheritance” is ideal.

why? one reason is maintainability - as more object classes get created, it’ll be harder to change base classes that get inherited by boatloads of other objects. in some sense, we’re prioritising creation of mixin-like classes.

another has to do with the nuances and (dis)advantages of inheritance of interfaces and implementations. unfortunately, im still trying to wrap my head around that right now.