>>>>>>A movement which encompasses the whole swathe of society like it did in the sixties and seventies<<<<<.
Poppycock! Folk music has never encompassed whole swathes of society even in previous centuries. It's always been very much a minority interest. We revelled in it in the 60s and 70s as it was a breath of fresh air, largely rejected the rampant commercialism of other musics, but it was always largely off the radar and you had to go and seek it just as you have to today. There were more folk clubs but not as many singarounds and sessions and festivals. Of course there is a popular folk movement even in areas like where I live where it has lain dormant for a while. Morris teams run their course but new ones spring up in their place.