RC Heli = expensive specialized mechanical parts, collective pitch Rotor Head is a nightmare.
quad = difficult to develop software control loop
One is easier to replicate after initial development than the other. Heli crash also usually results in destruction of Rotor Head, the most expensive part. You could use an analogy of Carburetor versus EFI.
Interesting, thanks. I've never heard this perspective before. So you'd say that anyone building an elaborate homebrew quad -- e.g., the TechIngredients guy at https://www.youtube.com/watch?v=4ZPvZiJLbvI , who generally seems to know what he's doing -- would be better off putting comparable effort (and comparable cash) into a single-rotor aircraft instead?
quad = difficult to develop software control loop
One is easier to replicate after initial development than the other. Heli crash also usually results in destruction of Rotor Head, the most expensive part. You could use an analogy of Carburetor versus EFI.