There is a new controversy reported on the Tesla Motors Club forum, where some Model S and Model X owners have reported up to 10% loss of range, and a significantly longer time when Supercharging, after a recent OTA software update. It has been speculated this is in response to a battery pack fire in China, where a Model S sitting in a parking garage caught fire for no visible reason. Speculation is that Tesla has reduced the usable capacity and maximum charging speed of one particuar older variety of Model S/ Model X battery pack to reduce or eliminate the risk of fire. Tesla claims this reduction in range and supercharging speed affects only a small number of older cars, and says it's working on a solution. InsideeEVs News report here: "Tesla Model S Shanghai Fire, Range, And Charge Issues Seem Connected"