Social pressure can play a role in the demise of regional accents. As someone who grew up in Appalachia, there are certain biases that come with that accent. I

Social pressure can play a role in the demise of regional accents. As someone who grew up in Appalachia, there are certain biases that come with that accent. It's is one of the reasons some professionals from the region try very hard to "talk normally." There is even training you can undergo to lose your accent. I learned early in my career that people make certain assumptions about you based on your accent. Over the years I have unconsciously developed a "public speaking accent" that is quite a bit different from how I normally talk. I've been told I sound generically Midwestern when traveling or giving a conference presentation (one person even said Canadian.) I didn't even realize I was doing it until one conference when someone pointed it out to me at a bar-track later in the evening.