Cities are big places, sometimes it takes 1-2 hours to drive from one side of a city to the other side. (Via the city centre, not a circular road.)
Some parts of cities are fringe areas with low populations, but some Robotaxi trips will want to go to those areas.
The additional considerations are:-
- Fleet size - convivence
- Cost per mile
If I am using a Robotaxi, I want one that always arrives fast and picks me up from wherever I am, then takes me to where I want to go, efficiently, and for a low price.
Sometimes in a city environment a competing service might beat a Tesla to the job and cost about the same amount, but if a Tesla is doing the same trip, I know the Tesla is making a higher profit margin.
IMO it will be very easy for Tesla to win any price war, most customers will not care about any premium aspects, but a clean car with comfortable seats, and good entertainment would be the expectation.
I don't want to pay more for a Robotaxi with a particular brand, and if I want to travel to the city fringe, I expect a Robotaxi to take me there.