I also wonder whether the choice of sensor technology they already (pre-)SOLD informs Tesla's opinion of what sensor technology is NEEDED for Full Self Driving

I also wonder whether the choice of sensor technology they already (pre-)SOLD informs Tesla's opinion of what sensor technology is NEEDED for Full Self Driving (Their view that LIDAR is not necessary seems to be an outlier in the industry; are we sure that view is not influenced by the sizable outlay they'd face for upgrading their previously sold FSD option cars if they changed their mind?)