[Muromec]

>Presumably it’s also your responsibility to pick and maintain a working self driving system.

I guess it's reasonable to say I should apply updates and get the car serviced and make sure the sensors are not obstructed, yes. Then the difference between "self driving" and "assisting" technology would be a matter of guarantee the manufacturer advertises.

Would it (hypothetically) be reasonable for me to expect that the thing will suddenly break on a highway in normal conditions without anything obstructing the way forward? No, I don't think so. Can I do something to prevent it or foresee it, except not using the self-driving technology at all? Can I choose to have a different self-driving tech installed in my car and retrain the model or control it's behavior in any way at all?

There are different answers to that and I guess the answers will also change over time.