I don't think it's ever been done since the advent of franchised dealerships. There has always been a level of support by dealers and training done for dealers through the manufacturer. All knowledge known by the independent facilities were trickled down by manufacturers who trained technicians to certify in their products.
And independents cannot perform factory warranty repairs. You must have a licensed facility with technicians to be able to claim warranty work.
I wouldn't want to sell a product if my seller was a direct competitor who can sell at a lower cost. And then, in return I would be forced to service and supply warranty repairs and explanations for them. I'd have to sell services at a premium to even stay afloat.
That's the thing is there is no tesla dealers. From what I understand you can only order online. And that's what the others are complaining about.
Yeah in the case of not receiving training from tesla. But not all warranty services have to be done by factory trained. (I am a factory trained ford tech through the ford asset program). And even my 2012 focus (from the lemon thread) has a third party warranty that was the only one offered on my new car purchase. And with my warranty I can go to any ASE certified shop for warranty work. Not intending an argument. Just saying they should have the infrastructure to have already planned repairs. And in my experience dealer shops already charge a premium and don't always do the work right.
This is from their site, and most expensive service plan was $2400 (mine was around $1800 I think) the expensive plan for them includes the "rangers anywhere anytime" deal.
****Tesla Service includes
Annual inspection (or every 12,500 miles)
Replacement parts like brake pads and windshield wipers (excluding tires)
24 hour roadside assistance
System monitoring
Remote diagnostics
Hardware upgrades
Tesla Valet Service
Tesla is putting in place a valet service, so that your car is seamlessly picked up and replaced with a loaner and then returned as soon as we are done. There is no additional charge for this.
Tesla Rangers Come to You
Tesla Rangers are service technicians who make house calls. For an additional fee, they can come to your home or office to perform most maintenance and warranty repairs.****