urning off GPS and LTE ruins 90% of the features in the car.

The main purpose of a car is “driving”, which you can do. Unless you cannot start a Tesla without LTE, which would be very stupid.

You can also always strip a car for parts. Teslas are not magically safe from that.

I read in another article that it is just supposed to be a first test of the feature before the global rollout.

The dev said that the framework is completely disabled once you purchase the ad-free version. Various people also confirmed that statement with anti-tracking software.