Just to add my data point...I have a May 2015 build Model S 85 and have experienced about a 30 mile loss of range since the 2019.16.1.1 update.Attached is a screenshot from Teslafi data showing my range from 8/15/2018 through 7/1/2019 where my range dropped from about 250 to 219. I scheduled a service center visit and they tried to get me to cancel it saying they remotely determined my battery stats were within spec. After pushing back I was texted this:"Hey Robbie, we did review your data and confirmed it. In 2019.16+ firmware the battery management software was updated to increase the performance and long term reliability of the battery. Older battery's (sic) with high wear from mileage, DC charging, etc. may have a range drop but it was done to improve the battery's overall health. There are no indications of internal or hardware issues with your battery. If you would still like to talk we can but the most we can give you are the talking points we were provided explaining this condition. I will resend them."Then..."1. As part of our recent revision of the charge and thermal management settings on Model S and Model X vehicles to protect the battery and improve battery longevity, a very small percentage of owners who own older vehicles may notice a slight small reduction in range when charging to a maximum state of change.2. The drop in range is not expected to continue and should stabilize quickly.3. This change is the result of the updated charging profile as well as increased cooling, which helps improve the overall health of the battery.4. Charging behavior will vary based on how the vehicle is driven, charged, and the age of the vehicle."When I visited the service center I said that if there are a "very small percentage of owners" affected, this implies some defect and that I believed the update was motivated by safety concerns, not performance, and if so, they should replace the batteries on the "very small percentage of owners" rather than cut 30 miles of range from the vehicles which I do not consider a "slight small reduction".The manager at the service center (Costa Mesa, CA) said there were going to have an engineering meeting and would contact me at some future point to let me know what was going to happen.They showed me a printout saying that the actual SOC was actually 80% when the car showed 90% and that this behavior would affect all battery types in a future update including 90 kWh and 100 kWh. I tend not to believe this last part.If I do not get a response or Tesla does not fix the problem or compensate me for degrading the performance of my car I am open to joining a class action suite or starting arbitration.