Well that's true to some extent, although it remains to be seen how the motors they're using compare in reliability to an engine and conventional rotor system.

Well that's true to some extent, although it remains to be seen how the motors they're using compare in reliability to an engine and conventional rotor system. Engines and rotors are pretty reliable when operated within specs. In any case, the controller is probably going to be the bigger reliability factor here, and having more rotors doesn't help with that.