They were easy to work on, but you had to do it much more often. Plus they got crappy mileage. This was also in the era when Honda and Toyota were really getting the piston engines right. My 2003 Honda Accord (V-6) is about to turn six figures and the only non scheduled maintenance item has been an alternator that went bad. I've changed plugs once. Still gets 30 mpg on the highway and everything (Power windows, AC, blowers etc.)still works.
Wankels were a neat idea that just didn't pan out.
Cool. Was there ever a Wankel rotary engine that a motorcycle, snowmobile or ATV was designed around? If there was, I’ve never heard of it.