We solved stability for a rigid drone that’s symmetric and designed for purpose. That’s a lot different than solving for stability for a variable size and weight human that’s wriggling around.
It’s just a digital gimbal. Similar to a light drone in a breeze.
> solving for stability for a variable size and weight human that’s wriggling around.
Was solved for Segways. Just need the third axis and some kind of special emergency landing solution (goo + inflato-ball??).
No, it’s more complex than that. A Segway is counting on the fact that it’s sitting on the ground. The force vector on the rider is purely a function of angle. A jet pack has the issue that there is a moveable center of gravity and moveable sources of thrust that feed back into each other. It’s doable, I’m sure, but it’s also much more complicated than a Segway + another direction.