From the research I had done into this previously, MobilEye started backing off from the partnership after one of the early Autopilot crashes into the broad side of a tractor trailer. They believed Tesla was being far too liberal with the testing and deployment, taking on far too much risk and trying to use a "brute force" improvement path through the data collection methods on public roads. If I recall correctly, Elon's statements at the time were that the backbone of MobilEye's system was easy to replicate, and thus they broke off to do their own thing.
Now we have a lot of uninformed fans who believe Tesla is the leader in data collection and know nothing about the history, know nothing about MobilEye being the true originator of all this stuff and having their technology in vehicles of all shapes/sizes across an array of manufacturers all around the world.
My 2021 Genesis GV80 will park itself while you stand outside of the vehicle