Idk theres a car dealership that has a 2 level version of this. The middle part is raised and spins with the base. Its not as wide as the old ones, but it seems just as dangerous.
Then theres the single person versions that works off of like angled centrifugal force? Idk. It spins and spins just from body weight. They can start it on their own, but I’ve had random kids ask me to help them stop, cause they couldn’t do it themselves. I see variations of these in most newer playgrounds. Some have you sitting, some standing. Many parents still dont give a shit.