I didn't find the author credible because of their statements going back 'centuries' ("Skinner created one of the most non-neutral accents in the past few centu

I didn't find the author credible because of their statements going back 'centuries' ("Skinner created one of the most non-neutral accents in the past few centuries" repeated somewhere else in the article which I didn't find just now), but despite this I found it interesting. I looked for youtube clips from several films mentioned, to come to my own conclusion. They matched what the author reports. So I enjoyed the article but (for myself) didn't necessarily judge the historical account to be accurate. Just read it with a grain of salt.