To be fair, Fiskers are likely to brick themselves and the company is still alive. They have some of the worst software in the auto industry.
That said, my point is that a lot of “smart” cars are designed work just fine offline. Being offline is common in rural areas and or when the driver decided to stop paying for mobile connectivity.
I’ve done the latter with a couple cars. You lose the ability to download new maps, see traffic, install updated streaming apps, and or remotely control climate / windows / locks with your phone. But I use my phone for music maps, and I don’t really care about unlocking the car with my phone.