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?)

My understanding is that FSD will at least require a new computer module, which they are supposed to replace for free for those of us who have purchased FSD.

However, it is an open question whether or not it will require additional / different sensors (like lidar).