I have a 2021 Model S Long Range "refresh" that is supposed to be rated for 405 miles. I have the lower range wheels and tires (21 inch), so maybe it is supposed to be 394 miles. But, when I charge to 80%, it only shows 245 miles of range at 80%. If I do the math, a full charge then would give me roughly 295 miles, roughly 100 miles short of what it was advertised. I have not tried to charge it yet to 100%, but assuming range is linear, does this mean that the battery is degraded, or asked another way, why am I not showing the advertised range (achieving the indicated range is another topic).