I hate to break it to you, but nowadays neither of those are exclusive to electric cars. Just sounds like you might never be buying a new car again.
It’s still easy to disconnect the cellular antenna if you’re fine with losing features like self driving and map updates.
It would be good to know which car companies don’t give annoying/intrusive warnings for doing the disconnect.
Plus I’d be concerned about gotchas regarding warranty and liability - GM just issued a recall for brake fluid level software not working, I don’t want to be on the hook for causing an accident just because I didn’t update my software.