Your post sent me to teslafi. I was well above the degradation curve until v9 was installed. All of a sudden, I was on the curve every day. My rate has leviled off to be exactly on the line. My charging went all to hell when v9 was installed. The facts seem to point to a software manipulation. I'm a geek, IT professor, this just shows that something is in v9. They stopped me from super charging from Nov till February, blaming charger office. But happened the day v9 was loaded. Now my rate of charge has gotten worse, I have called Tesla, oh it's the charger, pur BS. I used to start every charge at about 115kw, ain't seen over 100 lately. Yesterday was 70kw. My batteries are old, build in 2012. I asked about new ones "oh u will get 90, dont make 85s anymore". Friend in SF said he heard all battery packs were the same now in the S, for cost saving of making just one size fits all , and using software to set charge. I asked person at SC, can I upgrade to 100 if my pack has to be replaced? He said "that is in discussion ".