So, to continue our inexorable degradation of this thread:
The battery warranty back in the day was worded so that a reasonable soul would assume that Tesla would stand behind its battery and its BMS regulatory software no matter what. Drive your car, they said. Supercharge all you need, they said. Today, Tesla has beefed up its battery warranty to exclude loss of range (assuming cell voltage here) that is foisted upon the batteries and only will honor the warranty if there is physical (not artificial) loss exceeding 30%. Why the sudden change?
Condition Z or no condition Z, Tesla has learned something over the past six years. Exactly what they have learned is their closely-guarded secret, and it has likely precipitated this updated battery warranty. Tesla knows that they might have to cap new S and X vehicles in the future if certain conditions express themselves over time.
To my view, Tesla has placed itself in an untenable position: They are tacitly admitting that these batteries might be subject to non-warrantable reductions in range if Tesla detects certain conditions developing in the cells. Yet they still boast of rapid Supercharging speeds with no caveats about frequency of usage or charge levels. Moreover, Tesla does not provide its customers with best care battery practices, gauges, and other data for us to see for ourselves just what is happening when we drive, when we charge, and when our cars are parked.
I conclude that the original battery warranty was to promote the brand, period. We were hoodwinked into falling for the hype and hoopla surrounding this innovative automobile so that Tesla could grow market share and eventually release the Model 3 and Model Y. Tesla intentionally worded its original battery warranty as a marketing ploy to induce us to buy their vehicles, knowing full well that a handful of vehicles would wind up needing replacement batteries. Tesla did not expect the vast numbers of us who have driven 50-150K miles in 5-7 years and/or have Supercharged a lot of those miles. Tesla did not anticipate that some of the cars for whatever reason would spontaneously combust, either.
While I am not a lawyer, it is pretty much settled law that a contract (a warranty is a contract) dispute is generally settled against the party that wrote the contract. Tesla wrote the warranty contract. If the voltage capping software update revealed actual usage degradation that was masked by the previous iterations of its software, then we are not entitled to any redress. Yes, it was sudden. But had this software been installed from day one, the degradation would not have been sudden, so we are SOL. I can live with this.
Instead, Tesla has limited the voltage maximum artificially. Tesla changed the terms or has seized upon the ambiguity of its original warranty to tell us to pound sand. Then they exacerbate the situation with deceit, dissembling, and other canards to tell us everything is just hunky dory.