Where to start? How about this, when Mandrell was the Queen of the Country scene she was lucky to sell a million copies of her current release. Today, Carrie Underwood has just been certified 5x Platinum. (5 million copies sold). Therein lies the reason. Mandrell had a limited appeal, Underwood has a much broader one. Same with Garth. Country music really exploded with the emergence of acts like Garth, Clint Black, Dwight Yoakam, Alan Jackson and others back in the late 80's. Where the older country stars were happy with Gold albums, these guys were going multi-platinum. This new crop of singers made country cool to a whole new audience. That audience is still evolving and growing today. And it grows because of acts like Rascal Flatts, Carrie Underwood, Kenny Chesney, et al. Most of today's country audience has no idea who Barbara Mandrell is and would most likely change the preset if her songs came on the station.