Pears and Britten recorded folk songs before the " folk revival" began. They were of their time and that time is past.
Music moves on and changes. How guitar is played and accompaniment styles similarly move on and change. The "rapping tapping" ( Will Fly)is an example of this change. We may not all like these changes but they happen anyway. None of this means that we have not or cannot learn from the past. I think Ewan McColl was nearer to Pears then to Boden in style.
I see Mumford and Son are worth £37 million. Expect a rush on guitars and banjos.
Badly written but off out playing.
john