That's pretty close to what Tesla told me on the phone. I understand the range degradation as it's expected. What is unknown is the sudden and drastic range loss after 2019.16.x many owners are experiencing. It almost looks as they have shrunk our usable battery capacity to avoid 100% charging. In other words, If the charging now completes at 100%, it might be only 90% in reality. If true, the question is what's the reason behind it? A poster in another thread stated the 2019.16.x has increased the reserved portion of the pack by 1kW on his car. There are other possibilities for this sudden range loss. We just do not know.