As one of the middle-aged types, I think it is easy to forget that folk was not 'cool' (or whatever we called it) in the 60s either. The vast majority of teenagers at that time listened to 10cc and so on. There were groups like Lindesfarne and Steeleye Span that were part folk and part rock, in the same sort of way that the Corrs are not easily classified as one or the other now; but the majority of teenage music was not folk even using a very wide-ranging definition.

Back in the sixties, what most teenagers thought of as folk were people like 'Jimmy Shand and his Band' and 'The White Heather Club': not exactly manstream teenage material!