I agree they don't NEED it but there is absolutely no harm in them having it. As I stated earlier there will be people who have not heard folk music before who could be attracted in to the source material thanks to the efforts of artists who did different things with the music. Look how many people attended Bellowhead gigs across the country at the height of their career. I don't think all of those would have been follies before but I bet a decent number are now!