Among the most successful cars were those with straightforward replacement parts, a defacto standard, and reasonably well documented and available maintenance m

Among the most successful cars were those with straightforward replacement parts, a defacto standard, and reasonably well documented and available maintenance manuals. Tesla wants control over this, by literally renting the maintenance manual, and remotely disabling the car if repairs or parts aren't authorized. I don't expect the model 3 market will appreciate this business model. It will be a much more price sensitive market compared to the early models which has been relatively inelastic for repairs and resale. Consider the x86 computer market, if every component had signed firmware, and the main system verified this signature in case of component replacement, and would fail to function at all if signature verification failed. What a pain... Consider voting machines, proprietary hardware, expensive to design, maintain, audit, and go obsolete in as few as 1/2 dozen uses. Compare that to pencil and paper. The older I get the more Darth Vader I become: "Don't be too proud of this technological terror you've constructed." (Let's say the Force is common sense in this metaphor.)