I wonder why cars and trains don’t use tech like this to keep passengers stable, even when the road/track has bumps. Something like this, built into shock absorbers, could be revolutionary for transport.
I would say cost, imagine the R&D of the part itselft, but the cost of it in maintenance to the final user. I believe citroen had electromagnetic shocks in the 90's and it didn't catch much momentum but if you see the videos of it working, its exactly like you said, smooth as heck drive throwgh bumps.