worlds best selling car. Remember that the Tesla buying process is known as the "car buying process" since forever, outside the US, at least in the kind of countries where people buy expensive cars.
This is wrong. I grew up in Australia and the dealership model is the same there as the US. I don't know what countries specifically you are talking about, but the idea that you could easily buy a car online in the configuration you want for a standard price since forever is clearly wrong.
I don't understand what you wrote. Are you saying that outside the US, every manufacturer offers low-friction online sales, with no need to visit a dealer?
My understanding is that outside the US there's not the whole dealership model with it's associated markup as we have here in the US. You still have dealers but buying a car is just picking off a menu of options, pay the same price at every dealership and wait a few weeks for your car.
I got a 2015 Volvo with their "European Pickup" option and even though you went through a US based dealership that was how it worked. Also they didn't "package" options. You didn't need to get some "Cold Weather Package" to just get heated seats for example every option was ala-carte at a fixed price.