If you really want to have your foot in both worlds, you can always live the two-phone lifestyle. Might go that way myself eventually.
but that's just how it is, choosing free, ethical software is choosing a life of austerity and alienation.
I bet your Subaru is probably hackable, all these things run Linux under the hood, wouldn't be surprised if there were already a group of people on Reddit that have already done it. Lonely, this lifestyle does not have to be.
Years ago I would have said “much more likely to be QNX since a car always has a RTOS.” These days it’s likely Android Automotive, which has a massive share now. Note: despite the name it has nothing to do with “Android Auto.”
Overall, hacking on a car, even infotainment, seems very difficult. They really don’t want you to have any control over it.
While in theory that works, in practice I bear just iPhone all the time. With Android on the shelf most of its time. I even started to turn off its Wi-Fi so it keeps being alive after a week of being untouched.
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1 — I’m the lucky one who hadn’t been bootlooped, so I’m not on Pixel yet. Both phones are enough for me, performance wise.