There are a few practical considerations that dictate what kind of frame will serve you best.
For instance, want to ride on rainy days? Fenders are nice, really nice. If you actually want to carry something along, a rack of some kind is nice.
Try finding a CF race type frame with clearance for fenders. Or eyelets to mount them (or a rack) on.
I prefer a more versatile type of bike and I seem to be willing to suffer along with the weight penalty.

I suppose that's exactly what N+1 is for.