Both of the preceding comments are true. These things are about to arrive in vast volume, because the factories to build them are already starting to run. And they're nowhere near ready for that.

It took over a decade for Waymo to get from "able to drive around SF for demos" to "3x safer than humans, with thousands of vehicles on the roads".

A lot of these things may end up in closets, next to the VR headset and the 3D TV.