Eventually the engineers will create a bow that is so advanced it doesn't qualify as a "primitive" weapon. We've already been down that road to a certain degree...Remember when high let-off bows didn't qualify for P&Y?
Now, I certainly wouldn't want to still be shooting my Darton SL-50 @ 50% let-off (although I remember how nice it seemed in 1980), but I think my Trykon will be the bow they bury me with!