While being able to sleep (or work) in the car while it is driving itself unattended is the scientific and social Holy Grail of FSD, the actual
economic FSD Holy Grail is a much more modest technological and legal milestone:
- "The Tesla FSD car/taxi has to be able to self-drive to its next destination without any passengers on board at all, with high success rates, regulatory permission in at least one major market and low legal exposure."
On the actual trip where there are passengers in the car, one of the passengers is the designated driver with a driving license. (Just like the renting guest is responsible for an AirBnb home while using it.)
IMO
this is the technological milestone that unlocks trillions in taxi, ride sharing and business fleet logistics revenue and this is the milestone enables the Tesla Network - and I agree with Elon that this could happen next year already. (!)