You know what they say about never... ?Level-5 self driving cars are NEVER going to happen.
Please stop the insanity.
There are lots of other ways to make money, don't need to do it with cars.
Maybe start a restaurant or something? You already named yourself after food..
I don't know... As more and more 'things' require OSes, it is completely in Apple's interest (where their OS is the center of their ecosystem and their bread-and-butter differentiator) to explore said 'things.'
Why?
For starters: math. Over the years, they have trained a GIGANTIC user base, that is growing exponentially, on a specific way to interact with their technology. Set specific expectations with those same users about what it means to interact with their technology. With such a massive, indoctrinated, user base comes a level of risk mitigation (though obviously not completely devoid of risk) few companies can afford. The sheer volume of this well-trained base lowers Apple's risk when considering/entering new markets. In many cases, when Apple decides to enter a market, they instantly bring a tangible audience to said market. Not every company can do this and it's one of their most significant advantages - the result of years of patient, diligent, unflinching work to establish their base (thanks Steve & team).
Secondly: vehicles will only grow increasingly dependent on OSes as time marches on. Apple knows this. Hell, I'm a doofus and I know this. Thus, why on earth would Apple not be interested in getting in on SUCH a massive OS category? Said another way, why would they leave such a massive OS opportunity open for someone else to swoop in and start shaping users expectations of technology? They have worked too hard, over decades to let an opportunity this massive, drift by. Plus, they have proven pretty good at such things.
Third: Apple is clearly focused on being in the place sand spaces there target most needs - on handhelds (check), on computers for work (depending the type of work, check), on computers for fun (check), on computers for creation (check), home entertainment (check in pogress) and traversing between all of these spaces in cars (currently figuring out how best to check this box).
Fourth: we have to get off this "Apple = desktop computers" mindset. There was a time that was more the case. But I would bet my precious new iPad mini 6 that even back in the day, Steve and company were thinking beyond "desktop computers." The minute we start thinking differently about where Appel could have relevance, the possibilities begin to open up.
Fifth: like most here, I don't work for Apple, I'm not privy to anything different than the rest of us. But I do have curiosity and an imagination. Bridging the gap between one of the leading OS developers on the planet and future devices that will likely require an OS at some point isn't really much of a stretch. Even for a guy like me.