> neither company has the tech experience to build one

They have the experience to distribute software to millions of devices on a regular basis and run a logistics platform and a consumer app.

That's something automakers will struggle to do.

Automakers can build cars.

That's something Über will struggle to do.

Seems like a fairly straightforward partnership to me. There are many automakers and most of them (anything vaguely in the budget category) will be struggling mightily if robotaxis ever work.

Mightily struggling automakers like to make deals where they get to make autos.