Even though it was not the focus of your podcast, I found the bit about  eastern Kentucky accents particularly interesting.  Many persons fail to appreciate the rich variety of speech patterns, that the phrase "Southern accent" embraces.   I'm from eastern Virginia and my mother was from the hills of far northwestern South Carolina, and, though both accents were clearly "southern," they were quite different.

I remember once dropping down from the Blue Ridge Parkway somewhere in far southwestern North Carolina to head south to Atlanta and being  almost unable to understand what the clerk at the gas station was saying.   It was unlike any other variant I have heard, and I've traveled extensively in the South.  It was as far from my eastern Virginia accent as a Scottish brogue.

Enjoyed the podcast, too.  Even though I have no interest in brewing my own beer--my preferred tipple speaks Gaelic--it gave me a better understanding of the discussions of home-brewing that one is so likely to encounter these days.

Afterthought:  My trick for spotting a fake Southern accent:  Using "you all" as a singular pronoun.  Everyone knows "you all" is plural.