[ithkuil]

IMHO the biggest problem is the moral problem; even once the tech achieves better reliability in general (as compared to human drivers, who are quite crappy but we're all used to them), the cases when it will fail will be so spectacular and cause so much outrage because we're ill equipped to deal with situations where there is nobody to blame: we always try to find somebody to hold responsible. When there is none, we make them up (deities and whatnot).

When natural disaster strike, people feel plenty of emotions, including anger. Often that anger though cannot be directed to anybody in particular. ("God isn't easily sued

When machines misbehave, being by definition human made, it's harder to accept it "as just the way the world works".