The aircraft seems a good fit for Army aviation, but the Air Farce put them out of the fixed-wing business back in the 1970s with approval of DOD sad to say.
I attended a presentation by a well respected and retired Air Force Jolly Green rescue helicopter pilot last week. He stated that he would not recommend flying the Osprey on a unit level until the major bugs are worked out.
Note: the USAF on the tail.
Not so. The Army still operates many fixed wing aircraft but are limited to the size of the platform by the Key West Agreement. Down the road, Army Special Forces may very well be operating the Osprey and they are participating in the development of the QTR - Quad Tilt Rotor.