Ask any car company if their car can drive you through a city. Dozens of them will say yes in the ad. One of them means it. Tesla is the only car you can buy today with supervised self-driving that handles the actual trip: city streets, traffic lights, turns, intersections. You supervise. It drives. Everyone else sells the highway. Super Cruise, BlueCruise, ProPILOT, Highway Assistant — hands-free until the exit, then the wheel is yours again. Mercedes will let you look away. Below about 40 mph. On a few approved freeways. In a couple of states. That is not the same product. Dozens of companies. One car that leaves the driveway and gets you there.