Last time I drove a rental car I was constantly aware that it was probably tracking everything I did, sending that data back to its owners, who would then sell it on to data brokers and insurance companies and whoever else wanted it.
It was sort of tolerable on a temporary basis, until I got to driving along a road where the speed limit had recently changed. The car helpfully displayed what it thought the speed limit was, and suddenly I had to choose between driving safely and driving according to what the computers presumably wanted to see.
Drivers of the world, do not let your cars have Internet access. No good can come of it.