Body tracking video

Instructional-video-prolific @k_oshiro just published a video on body tracking! https://youtu.be/Vj0Z5cj6sb8

I wonder whether body tracking will make independent layer forearms (hinge joint at elbow) easier to manage too? They are a pain with draggers at present because dragging the wrist if the forearm is independent does not move the upper arm segment. With body tracking controlling each joint, I am hoping it overcomes this problem, which might make elbow joints look better...