diplomat33
Average guy who loves autonomous vehicles
The other metric is the cost of what Waymo's doing in creating their geofence. Add the cost of roving support vehicles (staffed with humans) and that's a helluva sunk and ongoing cost proposition to sell a service at or below taxi/Lyft/Uber per passenger mile.
The cost of remote assistance and roving support vehicles will come down over time. That's a temporary evil because it's the only way to help an autonomous car when there is no safety driver. As the Waymo Driver gets better with edge cases, Waymo will need fewer and fewer roving support vehicles or remote assistance. Eventually, Waymo will not need any remote assistance at all.