I'm not going to bicker your point. Cattle change constantly.
Just because Angus has not changed it's color, does not mean it has not changed pheno-typically or genetically. I can remember being at NYSF and having a huge debate as to whether the fair would disqualify some animals because they were offspring of a bull that had his papers pulled because he had HOLSTEIN in his "real" pedigree. Nope, they did not pull them and the registration papers were never pulled on his offspring.
Also, I can remember the AAA running ads bashing the "elephant breed" (Simmental), but the following year, the Angus bulls made the Simmental bulls look like midgets.
Angus used to be known for their muscling. For the past, maybe, 10 years, they have struggled to have better rear quarters than a Hereford.
I am a true supporter of the Simmental breed. I have bred them since their imported semen into USA, having my first registered calves in 1972. This is the 3rd time I have used the "letter E" to identify our calves. I have had registered 1/2 bloods that were BLACK in 1972 (with white markings). I actually have one cow family that goes back to my original 1/2 bloods (red lines).
We, as breeders, were not stupid. We knew we had problems with the breed for the commercial man to use. WE IMPROVED on the breed, making them easy calvers, easy keepers, and structurally sound. They were already well muscled, easy marbling, heavy milkers, fertile myrtles and fast growers.
Period... End of story...