Thanks to legislation, not to Tesla's magnanimous nature. Several states (notably, MA) had to wave increasingly large sticks at Tesla to get any traction there.

You couldn't even buy a screw from their online ordering system. "Price: Not listed". "Order: Contact Tesla" (who would then say "not available to you".

Even their service manuals. Make an appointment, in MA. Pay a fee. Go to a specified location, weeks later. Go into a room with paper and pencil, no cameras, phones, or computers allowed. Be given a time limit.