tldr; what's the "dumb phone" of modern cars?
I'd like to purchase a (relatively) inexpensive car with the following properties:
1. none of car's OSes send data to third-parties. Exception for physically hooking the car up to a diagnostic machine at the service place, assuming they aren't also forwarding what they slurp up to a third-party.
2. car's entertainment system is physically separated from any non-entertainment-system OSes.
Was there a particular year car companies "became sentient" and switched from just producing vehicles to to producing data collection machines with wheels?
There are numerous cars from about a decade (+/-) ago, that would satisfy these requirements broadly. However, you don't say whether you're looking for an SUV, sedan, runabout, etc.
Price range, brand preference, location also play a role.