It's mainly because they still behave more like airplanes. They can't hover (!), their turns have a certain radius, they have a take-off roll and usually a shor

It's mainly because they still behave more like airplanes. They can't hover (!), their turns have a certain radius, they have a take-off roll and usually a short landing roll, they need to actually fly a landing approach (albeit a very steep one). Also they have a single large unducted rotor that's easy to destroy or hurt someone with, and you can't have automatic collision avoidance, because you can't easily stop an autogyro in mid-air.