I agree that the argument is pretty weak. Even if it mapping is complicated and hard to scale, I think that cities themselves would go to great lengths to make

I agree that the argument is pretty weak. Even if it mapping is complicated and hard to scale, I think that cities themselves would go to great lengths to make their roads compatible with self driving cars. Cities could fund the mapping themselves, or could probably be convinced to install sensors at traffic lights that improve sensor reliability on the cars.