Note it looks like it's for developing drivers to run on embedded ARM devices in silicon validation. I'm at least as uninformed as anybody here, but that has lo

Note it looks like it's for developing drivers to run on embedded ARM devices in silicon validation. I'm at least as uninformed as anybody here, but that has lots of non-earth-shaking interpretations. If you have, say, a farm of little ARM-driven devices that you use as test harnesses for chips or other hardware, it isn't necessarily cheaper to port whatever variation of xnu to this particular hardware than to use an existing port of Linux and hire some folks who can help with the low level I/O bits. There might even be Linux in your world because, e.g. an acquired company built something on it that hasn't been worth porting. Or any of a ton of other possibilities. Having an OS doesn't mean you have to use (variations of) it for everything, especially if the new use you're thinking about is far from your usual.