tldr: Tesla uses vision alone, and has dropped radar and the other sensor. He makes a very decent argument why. (Surprisingly, he basically ignores night driving.)
Ironically this is what Tesla criticized Mobileye for. I still think that this is far the best demonstration of autonomous driving to date https://youtu.be/A1qNdHPyHu4
- car stalled in it's lane - complicated intersections - people exiting cars in it's lane - car going over into it's lane
If I had an hour of driving that I'd be stressed.