I think they've been focused on solving the "environment mapping and object detection" problem, and if that isn't solved then they can't have the proper inputs

I think they've been focused on solving the "environment mapping and object detection" problem, and if that isn't solved then they can't have the proper inputs to solve the "path planning / decision making" problem. It seems that they're close to solving the first problem, and are ready to move on to the next. As far as I know they've been using the fleet to collect raw camera data for their training set but I don't think they've used the fleet to learn driving behaviour.