Recently he’s noticed a shift. Waymo’s electric Jaguar SUVs, once known for the rote behavior associated with machine learning, have become more naturalistic and confident. Since launching passenger service in San Francisco a year ago, the vehicles have acclimated to a heavy and diverse mix of traffic: snarled roads, delivery trucks, scooters and cyclists who jockey for space on the road. Within that crowded ecosystem, Waymos now seem less afraid of confrontations. If another driver cuts off a robotaxi these days, the robot might even honk.