Yeah, there's a lot of people here mocking Carvana, but the user experience is fucking phenomenal. (Yes, aside from the "user experience" of selling your car for more than it's worth).
Buying from dealerships is not something I ever want to do again.
My understanding (from a poorly remembered Planet Money episode) is that this isn't a technical issue, it's a regulatory one. I'm not from the US and my memory is hazy so I don't know the details.
The last car buying experience I had the brick and mortar dealerships listed so many bait cars that online shopping was scammy/pointless.