[niwtsol]

I think this assumption is incorrect "Most cars are useful for 100,000 miles so the vehicle should be able to deliver for about 416 days."

There are several reports of the older version waymo cars lasting >200k miles, that would double the cost of your human driver and make the low end more profitable.

I'd assume that the insurance waymo has to pay per car is much lower as the removal of human drivers and proof of XXX miles driven without incident would drastically reduce the risk to insure. I also think the economies of scale and 24/7 always on + improvements on iterations will do nothing but drive those costs down.