I subscribed to FSD and got 11.3.6 on my refresh S. It is not using regen nearly enough in my opinion. I am constantly having to clean brake dust off my wheels now. Also, this seems like the brake wear will require replacements much sooner. The beauty of regen braking is it virtually eliminates these things. This is the first time I have had FSD beta in 18 months and I will say there are great driving improvements, but I won't keep it because of this lack of regen use.