I think that last one is a negative. I remember where the controls are in any given car, and would rather all of the controls in that care stay in the same place, even if that car is a decade old. Learning a different radio interface in each car isn't a big deal, because there's many more much more dramatic differences from car to car, so I have to learn that car anyway.

Auto manufacturers aren’t likely to provide updates over the long term.

Imagine if your ten year old car hasn’t seen an infotainment update in four+ years. Or if you want to buy used.

Personally I’d much prefer my phone. It’s baked into Apple/Google ‘s business model to keep it up to date.

Also I only need my phone’s subscription, not an additional one with the auto manufacturer.