As one who was there in the first revival, the biggest differences are the lack of participation and the social status of the "folkies".
There seems to be a comparatively youthful academic elite who kno0w absolutely nothing about traditional music, how or why it used to be performed.
In my youth, all folk music was amateur, builders, farmers, labourers, women and children were all expected to contribute to the general wellbeing of society, either by singing, dancing, reciting, or simply joining in.
The present revival ...if there is such a thing, is a different beast.
The audience expected to listen in silence to the personal woes of singer songwriters, or bee indoctrinated by the likes of Mr Bragg into the wonders of an heroic "working class" which no longer exists.
If we survive all that, the coup de grace will be the orchestral genre of folk music, a thousand bloody fiddles, five drum kits, and Christ knows what else, walloping along at breakneck speed, while some psuedo artistic twat