system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why don't new helicopters reflect the quadcopter designs commonly used by drones? Seems like it'd be safer and easier to control.
gpt
4 sets rotors with 4 motors as opposed to a single set of rotors with a single drive system is 4x the amount of equipment that can potentially break. 

Also a drone is generally small and light enough that it can use much less serious (and cheaper) components. A drone has small electric motors driving small plastic rotors, because that's good enough to lift a couple pounds of weight. A real helicopter has a giant internal combustion engine moving big heavy rotors.

Lots of things just don't "scale up" well at all.