I suspect the sheer weight of lubricant required for all those cams and bearings would keep it on the ground.
(Let alone the weight of the grid-like support structure. One must transmit all them there lifting forces to the payload area. Like the main spar in an airplane wing. Yeah, I know, carbon-fiber and new alloy technology and all that there )
Friction
9834.575(Did not bother to read the whole article. Bad me. If there are any compelling breakthrough concepts I missed, let me know.)
https://youtu.be/316AJOBQhew (0:16)
Maybe targeting startups who need some R&D number$ to glitterize their prospectus. Don't know what the tax bennies/detries are for this kind of investment. ...Mike?
Terry