Now. I am a HUGE advocate for pure bred dog. I feel like in the pure bred dog, humans can see their own history and themselves.
But I always fear Shelties becoming popular. Lassie ruined the Collie breed. Rin Tin Tin ruined GSDs. Overbreeding due to popular demand destroys dog breeds.
Aesthetics also destroy dog breeds.
I always feel that an organization like the AKC should hold higher standards with health and ability to do the job that the dog is bred to do, but unfortunately, they ARE a part of the degenerative dog breed problem.