Apparently some Tesla options are all software based and according to this article(linklink) Tesla inadvertently enabled up to $8000 options that original owners never paid for. A used customer who now has vehicle ends up loses Auto pilot feature he had when purchasing used vehicle because Tesla instead of letting it go disabled it remotely by software. They offer it back for $8000. Based on this article I see a few things: 1) Tesla is sloppy on builds 2) Tesla is greedy and overreaching because they screwed up and now reverting the feature. Realize this is akin to GM selling you a new car with cruise control but not on options sticker and then on a dealer oil change modifiying the vehicle without your knowledge and disabling it. 3) MAybe people already know this but I see hacking coming down the line.