When does market competitors collaborating on FOSS become anti-competitive, collusion, etc.?<p>If Apple and Google collaborated on a FOSS smartphone OS that both used, that would seem obviously illegal. What if the collaborated on the kernel only? What about the screen UI only? In a way that seems worse, but engineering-wise it's less significant than the kernel. A security subsystem? Some drivers? Keyboards?<p>I'm not sure how that applies to these automakers. While none of Apple's or Google's market power, as far as I know, and while an OS is less significant to a car than it is to a smartphone, possibly, I'd be surprised if they all can ship cars with the same OS. Where and how is the line drawn?