"Are you listening Jim?"
No- I'm reading Ake
I didn't understand your point
Pentangle were a rock band using folk song (sort of) and like all such artists, they passed their sell-by date and moved on
When that particular product outlived its commercial value it disappeared from the shelves
If you want to find a form of folk experimentation which has become ageless, try Delius of Vaughan Williams or someone as exquisite as GEORGE BUTTERWORTH
Jim