Comment by loosescrews

I have an electric Hyundai and you can disable all internet connectivity fairly easily. I have mine disabled and the car works fine. It never connects to any internet connection. I suspect that most other modern cars are similar. The firmware is closed source, but it works fine. It supports CarPlay and Android Auto, which are effectively open standards, so you can replace the infotainment system with whatever you want. This is standard for modern cars.