> Unsupervised in what sense?

Unsupervised in the sense that there's no driver there to clean the car when it gets dirty. At the same time, presumably part of the odor of an uber comes from the driver, so that helps. I wonder if waymos roll down the window (weather permitting) between riders, to air it out. Might be dangerous at a red light, since people could throw stuff in or even dive in through open windows.