The California Car Dealers need to go pound sand! They are why we also can't get over the air updates!
OTA has been used on GM products with OnStar and also specifically reprogramming the Cadillac ATS headlight system, which is a safety system.
I do not think OTA updates are dealer assoc related. I think it's more security and bandwidth issues.
Tesla right now can afford to reflash 200,000 cars that sold for $100k ATP. And they have had their cars stolen by wifi methods.
Do you think Tesla could afford to set up a system to reflash 100,000,000 cars globally at a $30k ATP?
But understand that Tesla does not have an option. All their cars must be flashed since they are sold in a not-fully-functional configuration and they do not test their software to the level that most companies do. They are more like a 'free-ware games' level of product testing, not like cars.
Since they have so few service sites, and have stopped any service competition, they physically cannot service their cars programming.
I can reflash my GM products in my garage with any available library configuration. I can see the entire service manual and parts list. I can buy special tools. Tesla owners have none of those abilities.