I have those things in my house but it's all local using home assistant and no vendor can monitor it. I can access it remotely but only by vpn.
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.
Same here with regards home assistant.
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.
If you ever have a problem with your Chinese EV, just call the Ministry of State Security. I'm sure they can scan it for fault codes. They're probably already monitoring it.
Haha... We used to have this joke in Holland. Our former secretary of justice made a dirty underhanded deal with a top criminal for more than a million and when it came to light he pretended to "have lost the receipt"
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"
https://en.wikipedia.org/wiki/Fred_Teeven