Think about this as one possible use:
NY Law firm:
An average lawyer bills at $400-500/hr, has a family, lives in Connecticut/New Jersey with a 1.5 hr commute each way. Has the option to a) drive self with 3hrs of lost productivity/day b) go by train with 1.5 - 2 hours of lost productivity per day depending on if they can work during the commute c) hire a driver/Uber at a cost of $250-300/ day (conservative). Usually it is a hybrid mix of all three.
Firm decides to buy a fleet of Model S/X. Even without the possibility of shared rides, car picks up individual who now bills for 2-3 more hours/day. ROI is $750-$1500/day. Send the car to get the billing attorney (consultant, etc.), drives individual(s) into town and drops them at the office. Drives out of NYC and parks in a cheap lot in Jersey, or heads to the supercharger to recharge, instead of parking in a costly downtown garage. The car is summoned to pick them up and take them home. Autonomous driving pays for itself in about 2 weeks (10 days at $750/day) and the Tesla is paid off in 3-6 months ($750/day x 100-120 days) from increase in billable hours.
Some may think this is a niche case, but I would guess there are hundreds of thousands of professionals that meet this criteria in each major city - Chicago, New York, Los Angeles, Dallas, San Francisco, Tokyo, Amsterdam, Beijing....etc. if there was a worry about Model S or X demand exhaustion going forward, you have a potential for a dramatic increase in fleet sales to high end businesses to increase billable hours and productivity.