Based on estimates that I have heard, the cost of a single car can be upwards of $300K. This limits putting large fleets of cars on the road only to the well funded (Google/Waymo, GM, Ford, Uber, etc) for only testing purposes. Smaller upstarts would need those cars to start taking rides and generating revenue a lot sooner. This seems like a worthy innovation to bring down costs and encourage more competition in the space.