2019 Model X, Raven, September 2019 production, factory 22 inch wheels
I have now come to realize this is a known issue, but want to caution others as it caused a trip interruption for me, and an unexpected Service Center visit. Check the rear inside tire wear! I checked rear tread depth before starting my 600 mile journey but really looked at only the center and outside, which was 4 to 5 mm. (The new Pirellis are 8mm.)Turns out the inside was completely gone, and resulted in a flat tire, and the other on the verge of blow out! Of course the Service Center blames alignment, which was not off all that much and the real culprit is the non adjustable rear camber.
Having researched after the fact, I now know this is a known issue, and to expect to get about 25k miles on the rears, (I had 28k), and perhaps 40k on the fronts. I recommend putting the suspension in the highest position and take a look at the inside of your rear tires. My normal default is low. I have not seen this level of rear tire wear since the days of the early Acura NSX which on a good day got 5k miles!