You have your definition, and other people have theirs. I have studied the entire history of country music, and it hasn't been consistent in sound from start to finish. The Opry tried to ban electric guitars and drums, and those bans were broken over 50 years ago. If it's OK for Bob Wills to bring a drum kit on the Opry, then it's OK for Taylor Swift to call her music country. To me, most of the classic country of the 60s is pure pop when compared to Roy Acuff. It's all about one's point of view. The fact that the same studios, musicians, writers, and artists who made classic country in the 60s, from Conway Twitty to Patsy Cline to even Johnny Cash were accepted as pop stars in their time says it all to me about strict music classifications. In other words, it doesn't matter.