Yeah where they have every inch of SF mapped, and then still have human interventions. We were promised no more human drivers like 5-7 years ago at this point.
High speed connectivity and off vehicle processing for some tasks.
Density of locations to "idle" at.
There are a lot of things that make all these services work that means they can NOT scale.
These are all solvable but we have a compute problem that needs to be addressed before we get there, and I haven't seen any clues that there is anything in the pipeline to help out.