I think it drives at an important point: Your job isn't done just because you've somehow managed to design and implement the perfect component that's absolutely

I think it drives at an important point: Your job isn't done just because you've somehow managed to design and implement the perfect component that's absolutely reusable. There are plenty of internal and external forces that will turn that component into something imperfect and flawed, if not replace it outright with something that is far less usable, reusable, appropriate, etc. It requires constant vigilance and maintenance to maintain that state.