The way I look at it is like this most "backyarders" are way too impatient to have a Heritage Breed.The "downside" which I try to warn the backyard gang is simply this. These are not anything, absolutely nothing like a hatchery, utility bird. They'd eat a backyarder out of house and home, take a year to lay, lay far too few eggs, I'd guess, for the them to ever be happy with them. This is just my guess, but I think most backyarders would NOT like these birds. Dunno.
Most want a fast growing birds that produce meat and or eggs quickly on the least amount of feed.
Chris