It's relatively easy if you've solved self-driving. It's no longer a monumental research problem. Waymo has been scaling 5x annually since Oct 2020 and they say it was mainly enabled by increases in reliability.
I know, doesn't change anything about what I said. Cars were not the limiting factor. To sustain the 5x growth rate, they will need more cars, which is why there's over 2k in the pipeline and why they've recently built a factory capable of making tens of thousands per year after reaching full capacity.
