Sale in the USA of ATV trikes was banned from April 22nd 1988. Dealers weren't even allowed to sell used ones. Private owners could still sell theirs. The ban was lifted in 1998 but nobody is going to go back to making them because people were and are mostly too stupid to use them properly.
https://thumpertalk.com/forums/topic...ned-from-sale/
I remember one video used to promote the "ATVs are deadly!" campaign. Some dumbass parents put their very young son on the biggest quad made. He took off, hit something. Kid goes flying, the ATV flips a few times, lands upright. The kid got up and ran right back to it.