Coolidge was born in 1872, so you're looking at more like 5-6 generations from the most modern forms. And I don't see that picking on accent specifics is all t

Coolidge was born in 1872, so you're looking at more like 5-6 generations from the most modern forms. And I don't see that picking on accent specifics is all that interesting? It's true this isn't the accent that you hear most commonly on the streets of San Francisco, but it's a real one and it and variants still exist today in New England, where he's from. Again, I'm not saying there is no change at all, I'm saying this change is trivial when compared with language from people born c. 1750's. And that this seems to be reasonably due to the presence of audio recording technology.