I found this Youtube video from 10 years ago where someone made freeline skates with dampers:
It looks like he is able ride smoothly on pretty rough surfaces using these, very cool! Does anyone else have experience with these? Are they worthwhile? Can you buy them anywhere?
More generally, I realize this is a fringe market, but do companies like JMKRide do any R&D to explore and develop alternative freeline skate variants like these? Seems like all they have and have ever had is the 1 model... Is freeline skating really one-model-fits-all? :)