And also San Francisco and LA, if we're talking about Waymo. More generally, I think this is the kind of rollout you'd expect from a technology like self-drivi

And also San Francisco and LA, if we're talking about Waymo. More generally, I think this is the kind of rollout you'd expect from a technology like self-driving cars: slow to start, and likely exponential beyond a certain point. The time from 1 to 10 cities may very well be longer than from 10 to 100 cities.