The attitudes and prejudices of speakers towards various languages and dialects is important “peri-linguistic” data. They may influence the development and differentiation of language itself. Or they may not — just voices in the wind.
Gripes of a pseudo-expert
Thus, when a major, even venerable magazine, Harper’s, publishes an essay “Semantic Drift” by Lionel Shriver, it deserves critical attention. I have seen many such pieces before — a pseudo-expert bitching about linguistic developments he doesn’t like.