Rotarys are so great that theyre commonly used in cars all over the world..... oh wait...........

oh well, i bet if someone produced a rotary car in todays market it would be a road conquering beast of automotive technology and would have people standing in line to buy one......

oh wait......
rotary makes easyer horse than cylinder motors.
only that it lacks the people who knows how a rotary works, let alone, how to work on one.
rotary isnt economy friendly, i give you that.