Eli5: what are the benefits of a normal helicopter design vs a quadcopter we see on drones?

Question

Eli5: what are the benefits of a normal helicopter design vs a quadcopter we see on drones?

In: 210

Answer 1

Manufacturing cost, most likely. Simpler machines are cheaper and easier to produce, and in business, as in most things, if the question begins with “why don’t they”, the answer is almost always “money”.