But their Arizona test is just that, a test. They are (or at least they state that they're) polishing the experience of using the service. What better place to

But their Arizona test is just that, a test. They are (or at least they state that they're) polishing the experience of using the service. What better place to do that than in a place where demand isn't going to be especially high, with ideal weather and lots of well-kept roads? Surely nobody thinks the Arizona service is Waymo's best stab at a productionalized offering.