Soooo I don't mean to state the obvious...but it seems it is not as apparent to some.
It's generally understood that (using Math)....
Carving/Racing Skis = Stiff / 65 - 70 mm Underfoot and Traditional Camber
Powder Skis = Softer / 120 - 125 mm Underfoot and Reverse Camber or Rocker
so using the law of averages...
The perfect all around ski should be a medium flex, flat camber, 95mm wasted ski?
For those of you not proficient in story problems
65 + 70 + 120 + 125 = 380 / 4 = 95
Soft + Stiff / 2 = Medium
Camber + Reverse Camber / 2 = Flat
So my theory is, anytime you move away from this starting point, you're favoring one end of the spectrum at a sacrifice of the other. You add width for more float? You sacrifice carving ability. You add camber for carving? You sacrifice Float. And so on and so forth.
Personally I like the idea of having a large quiver for all sorts of different conditions. It keeps me interested. But for someone who lacks the funds for lots of skis, or you're just getting started buying your first pair of "all mountain" skis, the choice seems clear.
Captain Obvious, signing out.