Got my alignment checked today. I haven't compared the results to the previous one, but I will do so and post it soon. The first one was done at around 5000 miles after my wife hit a pothole and the right rear tire blew out. Tesla was the one who noticed the alignment was out at that time. They didnt mention anything about any strange wear patterns on the inside edge that others were seeing who had bad alignments, but that doesn't mean there weren't wear issues. Seeing that the right rear was brand new, and I didn't really see any issues with the left rear, I was assuming I didn't have those wear issues. For all I know though, it was there and I didn't see it.
Because the alignment was bad at 5000 miles and we weren't entirely sure whether they replaced only one or both rears, we took the car in today to have the tread and alignment checked again at 15,000 miles. Sure enough, the left rear had inside tire wear. I don't know if this was there previously (it wasnt to the cords as others have shown) at the 5000 mile alignment check. They said the tread on all of the tires was still good (they were surprised that I didn't need all new tires at 15,000 miles.... It seemed like they expected them to last about 8-10k max). They recommended swapping out the left rear due to the inside wall wear (I forgot to take a picture... It was noticeable, but not bad). They also recommended swapping the right rear to keep the tires even.... They didnt suggest that when we had one tire replaced at 5000... I declined on getting the right rear replaced as I figured I would wait for a better time to swap both. I did swap out the left rear. From the looks of it, and I'm not driving like an old lady, these tires would have lasted me 20k-25k miles, if not more.
My guess is that the wall wear was there at 5000 miles and hasn't gotten worse and the alignment was still pretty close to good. I wish they would have noticed the wear the first time around. I really think it is just the alignments from the factory. Hopefully they are fixing this issue.
They actually charged me less for this tire than the last one... The difference was that they charged half as much/hour for labor.... Strange.