SAMS Photofacts is the place to start.
“......You see, you can buy a Tesla, but you’ll struggle to break free of the company’s orbit even after you’ve handed over your money. The company owns the retail and repair channels, and it controls sales of many parts as if they were state secrets. With its ability to monitor and update vehicles over the air, Tesla can extend and shorten a car’s battery range, cut off its access to the Supercharger network, and learn of its behavior in fatal wrecks to deflect blame from the company, all without ever touching or seeing the car.........”
https://www.caranddriver.com/features/a33660589/rich-benoit-tesla-rich-rebuilds/