So it really wasn’t snuffed out, it just stopped being used.
Yeah. Regional dialects have all been suffering in the age of electronic communication. TV and radio push a standardized dialect with a lot of strength. Dialects like this one was probably never used by more than a few hundred people at the same time, as the village got smaller, as more of the people living there grew up talking like what they heard on the TV and radio rather than their parents that number dwindled until it was eventually just one really old guy. Used to be almost every town or village had some sort of variation even from a town a mile away, then we started traveling more, then came radio. The forces of history are hard on small region dialects. Heck even large region dialects are suffering, lots of people that grew up in the South don’t sound Southern anymore.