After 3 years driving my Model S I learned a few things about the battery and decided to make a video helping explain many things going on inside the battery. I really tried to keep it short, but ... oh well I know there are some strong options and definitely some myths that keep getting repeated. If you don't want to watch the whole thing and just want to know where my degradation is after 3 years and 115k miles: I lost about 7% capacity. Acceleration seems unchanged. Supercharging is definitely slower than it used to be by aprox 15%.