I don't plan to ever share or rent my car. I also intend to continue to OWN my car, not have some sort of End User License Agreement with Tesla giving me permission to "use" my car while Tesla owns it, kind like the difference between OWNing a book and having a EULA allowing you to read (but not share) a Kindle ebook.
Think about it: we all know Teslas are computers on wheels. Even if you buy the car for cash, at some point it's basically a piece of hardware that is worthless without the software, and it is starting to become clear that you are not going to own the software and the functionality that the software brings. That'll be Tesla's. We're there already, sorta, but it's no big deal. Yet.
I worry that the DNA of Silicon Valley is going to finally show through with Tesla in the coming years: and from Tesla's perspective it does look tantalizing. Who needs auto dealers at all if there are vast fleets of Tesla robo cars making the rounds? All you need is a smartphone and a credit card and you can bop all over town or to anywhere, someone's Tesla will take you. So ends the whole auto dealer controversy.
But the price we pay for this shiny future is a car that is tethered to the mothership of Tesla, and under Tesla's control, and, face it, if so ordered by the government or law enforcement, suddenly under their control, including by mistake. Great technology, but at the price of a big chunk of freedom and independence.
No, I think I will just drive my increasingly clunker pre-AI, pre-AP, pre-Parking Sensors model S.
And I say this as someone who has a 3 on order (which will be my wife's car).