Last October, Waymo did something remarkable: the company launched a fully driverless commercial taxi service called Waymo One. Customers in a 50-square-mile corner of suburban Phoenix can now use their smartphones to hail a Chrysler Pacifica minivan with no one in the driver’s seat.

And then… nothing. Seven months later, Waymo has neither expanded the footprint of the Phoenix service nor has it announced a timeline for launching in a second city.

It’s as if Steve Jobs had unveiled the iPhone, shipped a few thousand phones to an Apple Store in Phoenix, and then didn’t ship any more for months—and wouldn’t explain why.