I ponder the same thing. On My Jeep all that nonsense is tied explicitly to the radio. If you yank the 4G modem out, it's all as good as gone - though then the GPS map feature doesn't work either. If I replace the radio entirely I gain control, but lose the auto emergency braking system. That's unfortunate lol.

Luckily no required monthly services. I have no interest in a car with that.