I prefer the big old breeds because they're reliable. They are smart, tender, tasteful, and in reslity don't take that long to grow. It seems to me a matter of impatience was the only factor that lead to the CX gaining popularity. There's no way else it could be so famous, with that kind of quality.
CX - Tough, Flavourless, Plentiful, So degraded that it needs to be intensively raised, difficult to raise, weak, otherwise pointless and seemingly random deaths.
Freedom Ranger Tribe (and rainbows, gold nuggets, etc.) - Tough-ish, Flavourful, still Plentiful, intellegent, easy and simple to raise, strong, few unnatural casualties (until slaughtering day)
Heritage Breeds - Tough-ish, Very Flavourful, still Plentiful, also intellegent, easy, simple, and carefree to raise, strong, also few unnatural and unexpected deaths..