Windowing systems and GUI modules and so on and so on, all give us powerful capabilities but also come with their own conceptual frameworks that need to be understood and plugged into each other. If both the module designers and the engineer of the larger system are working from roughly the same mindset, this is routine work. But if the former and the latter worked on entirely different machines, trained by computer science in wildly different stages of its development, I'm sure things can get much more "fun."

Intergenerational software development will someday be its own sub-discipline, with professors and specialized techniques and everything.