rotaries can be just as reliableas piston engines, IF you treat them with the care they need and build them correctly...
a mate had one in an RX3 for 4 years, pulling over 400hp atw for all four years... he didnt end up popping a seal, but took it apart to see wear and tear.. now he still has the same housings and plates as before, but replaced seals.... goes to show they can last if you treat them right...