Try synchronizing, tuning, and rebuilding 4 diaphragm-venturi carbs on a Honda motorcycle for a while, and you'll have a bellyfull of "challenge". One nice thing about beating one's head against a wall is the fact that it feels so good when you stop doing it. One microscopic piece of dirt in one passageway of a single-carb setup can cause untold headaches. Why multiply the possibility of that kind of grief by a factor of two, three, or four (or maybe even 5 or 6)? Making things unnecessarily difficult for the sheer joy of self-inflicted pain has a name- - - - -it's called masochism!
Jerry