One of the worst examples of "retro-PC" was Disney keeping Dumbo from distribution for years because the crows were thought to be offensive, particularly their accents. Well, the crows happen to be the hippest, most intelligent characters in the movie. But nobody seemed to notice that.
Also, the film of Porgy and Bess didn't preserve the original authentic accents used in the stage version for the same reason.
And heaven forbid we should stage The Merchant of Venice or Kiss Me, Petrucchio without holding a seminar on Shakespeare's antisemitism and "male chauvinism". That is a curious term, to say the least. How many people abbreviate it to "chauvinism" without knowing what that term means? Chauvin must be rolling in his grave.