Comment by rikroots

Strangely, it's the insular dialects across Britain that have become more bastardised over time. The North American English dialects are far more conservative when it comes to evolution. As this BBC article[1] says: "[...] although there are plenty of variations, modern American pronunciation is generally more akin to at least the 18th-Century British kind than modern British pronunciation. Shakespearean English, this isn’t. But the English of Samuel Johnson and Daniel Defoe? We’re getting a bit warmer."

[1] https://www.bbc.co.uk/culture/article/20180207-how-americans...