think that is a entirely fair assessment. I love tesla and have encouraged as many people as I can to preorder model 3s. But I dont expect to ever use mine for personal use. It seems like a waste considering the potential margins, and as you point out, probably not going to last more than ~5years. For example, estimating Teslas production: 500,000 yr1 + 1mil yr2 + 1.5 mil yr3 + 2mil yr4 + 2 mil yr 4 = 7 million self driving taxis worldwide by 2022. Uber has like 300,000 drivers that can only work 40 hr weeks. So effectively tesla network would be 100 times bigger than Uber is today. That would be a pretty saturated supply of self driving cars. Granted with the exception of national boarders they could self organize and make sure the distribution of taxis was equal all over if permitted, so you'd have service in the middle of Kansas potentially. I imagine at that point tesla would be paying you an hourly rate rather than people that actually got in your car, just to maintain market share everywhere they could. But at some point soon after that Im betting cars will be rolling off the factory line either being a tesla owned taxi (because theyd have a ton of money by then) or be a personal vehicle but models produced after x date wouldnt be allowed to drive on TN.
When Tesla starts producing Model 3, it will be distributed to customers all over the world and in most of the world TN L5 autonomous fleets won't be legal. My guess is that Florida will see the first TN fleet in 2017-2018, but it won't be legal in any other state then.
The TN fleets would be in concentrated service areas that provide saturation so most of the vehicles will be company owned. Tesla would allow owners who happen to live in service areas (say in Tampa Bay Area) add their cars to the fleet, but they have no reason to let third parties buy up Teslas for that purpose any more than they would allow Teslas to operate for Uber or Lyft.
Over time there would be enough owners in service areas to matter and Tesla could accommodate their participating in TN easily.
I think TN will accommodate more sorts of uses than Uber. For example a sort of friends and family shared use that doesn't charge and only allows a very limited group of users. That might be available as soon as it's legal in a jurisdiction, while Uber like service to the general public would have to wait for Tesla to saturate a service area and roll it out.