Phase change is a great metaphor. Once conditions are right, network effects between particles coordinate to rapidly produce a reaction in the entire substance.

Phase change is a great metaphor. Once conditions are right, network effects between particles coordinate to rapidly produce a reaction in the entire substance. The catalyzing particles here are people. Once people see that autonomous driving is "here", the incentives will be too powerful to ignore, for businesses, politicians, and others who live by exploiting opportunities. So yes, I think once change comes, it will be rapid and fairly complete. Possibly at cost of human life.