What I’m suggesting more than asking is, when you say that open source has lifted their development burden, it makes it sound like it’s a unidirectional taking.

What I’m suggesting more than asking is, when you say that open source has lifted their development burden, it makes it sound like it’s a unidirectional taking. And sure, some might be freeloading. But they also do contribute quite a bit to open source. https://opensource.apple.com/ https://opensource.apple.com/ I know your response was more to correct the “developed from scratch” but I still think it’s important to note that it’s not unidirectional. Even in the development of their own platforms, you can find old Usenet discussions of how they were feeding things back. I think they could have gone their own route but Unix compatibility was important. The history of Next, Apple, and the open source community is very intertwined and unfortunately cannot be reduced so easily.