Funny, I will not buy a car that has an app.
Do you also not have house monitoring (you don't need to control every light switch (which can be useful to have lights on when you get back home), but things like temperature, humidity, power use, air quality, water use/leaks is far cheaper than 1 insurance claim).
I'd want the same for my car if I had one. No manufacturer remote access. Any 5G module in it I would remove. Unfortunately the EU mandates ecall now but I'd just put that back in for the yearly car test.
And I agree some sort of open source solution would be nice for cars too. Especially with flood of Chinese EVs some sort of legal+technical framework is needed.
Perhaps even government agency that handles that sort of thing for you.
But until something truly secure and open source comes about - I'll trust Tesla instead.
The affair was not too long after the Snowden and Manning cablegate revelations so there were a lot of memes going around saying: "NSA helps minister retrieve lost receipt"
No I don't have house monitoring. I have a metal key that I use to enter it. When I enter the home, there is a rectangular box that I press with my finger, and it turns on the light. The A/C (that also does heating) can be set to a certain temperature with a hardwired box on the wall. That is all the tech I have at home.
With a car, I prefer a car that I can monitor on the dashboard or center console itself. Fault codes can be read over OBD with standardized equipment. I have owned cars over 15 years old that could still tell me what was wrong without needing an app or subscription.
IDK what apps do you even mean as the car can unlocked and controlled by simple public key exchange. Internet connectivity is optional.