That makes sense. The VW I’m thinking of may have been level 3 (trying to remember autonomous driving levels off the top of my head so don’t quote me on this), as I believe it needed guidance from on-road infrastructure to double check safety issues, which would have obviously been too much hassle for the US.

The proof of concept was miles ahead of Tesla has ever been, though, so it’s unfortunate that we can’t be bothered to add some sensors to the road