Here is another video. Traxxion claims the stock shocks are underdampened and undersprung by at least 50%. They also said the front shock is sitting on the shock bumper under just it's own weight.
It is certainly true for gen 5, and probably the same for gen 6 ... basically the springs are worn out at 20k. The springs and shocks in gen 5 remind me of new cars from the '70s. After 20k, if the shocks were not replaced, the car rode like **it until they were. Back then, cars came with a 80/20 shock. The shocks provided 20% resistance on nose dives and 80% resistance when rebounding up. Which is a great shock for a new springs. However, when the spring softened and begins to sag, it then needs a 50/50 shock ... same dampening up and down.
In one of Max's videos he show his Wing continuing to bounce 3-4 times after pushing down on the bars. Remember the bumper test on cars ??? Push down hard on the front bumper and the bumper continuing to bounce 3-4 times (also called cycles), and with new shocks it settles between 1-1.5 cycles ???
With Gen 6 ... welcome to auto shop class Basic Car Suspension Systems 101.