So I'm sitting and musing about things last night, and I got to wondering, why are multi-rotor (usually four) configurations so ubiquitous in the consumer/recreational drone space? Is there a practical technical reason for this? Are there any single/dual rotor consumer drones? I know that r/c copters are a thing, why not make them semi-autonomous, ergo, drones? And if there is something better about quadrotor setups, why aren't there any (or more) full-sized, passenger-capable quadrotor aircraft? I'm interested to hear any thoughts/insights on this.
