I have a 2015 P90D and while I thought I was purchasing a range upgrade a few years later I discover that what I had actually purchased was a the accelerated battery deterioration package.
Car has about 55k, very little supercharging. Last year I reported my concern of the decreased range and Tesla responded that the capacity was fine it was a calculation error and recommended changing my charging habits. For over 6 months with no improvement and them doubling down on "its a calculation error" they switched course and now say it's normal because all the cars with the same battery have the same range/capacity. According to TM-Spy I am down to about 74kw capacity which is consistent with lost range. Currently the loss is sitting around 12%.
They just cannot admit that they made a bad batch of batteries that deteriorate much faster than expected. There is no reason that after a few years the 90kw battery should have less range/capacity than the same aged 85kw
While on a smaller scale size wise, but with higher customer base, when companies like apple or Samsung realize they produced a bad batch of batteries they offer replacements. While, on the other hand Tesla replaces a few owners batteries and then tells the rest of us that it is normal.
As posted previously, now with the model 3 and Y out, they clearly don't care about the customers that believed in them and made them the company they are today. Replacing a few batteries with manufacturing flaws would go a long way to restore faith in the company. It's hard to recommend spending over 100k for a car that the manufacturer refuses to stand behind.