In addition (and this is slightly offtopic to the lawsuit itself, apologies), aside from a few high profile open source projects like LLVM that help drive their

In addition (and this is slightly offtopic to the lawsuit itself, apologies), aside from a few high profile open source projects like LLVM that help drive their business, the default is that Apple employees are not allowed to contribute to open source projects. This is why you see so few Apple contributors in open source projects. This is in sharp contrast to, say, Google, which actively encourages open source work in a number of ways. Making it relevant to the original topic, that's a fairly common path for people to bring technology out of the company. I'd personally argue that it's ethical, ethical, and of benefit to society. Whether companies think that such lenient approaches to open source benefit them apparently vary pretty widely from company to company.