This will be interesting to watch. If I bought an autonomous car and the autonomous mode was disabled for a few days or even weeks while a bug was fixed I can always fall back to driving it myself. If that's not possible (maybe because the car doesn't support it or I didn't have a licence or human drivers had been banned) and suddenly it's a whole different situation. Of course owning a car might become less common in itself, if you're just taking them like an Uber you can always switch to a different company.