Jim.
Define Folk Music Ha Ha!
Butterworth is fine, as are a lot of classical composers who utilised tunes from various traditions.
Bela Bartok for one.
Just drop the "Folk" tag.
It's all music.
If you like some things...Great
If you don't.....Great.
I don't actually care what you like or don't like.
You'd probably say the same to me. Fine. No problem.
Got to go now, and revisit a recording I made of Peta Webb at the old Topic studios nearly 20 years ago.
(bet you wouldn't call her a Weak Breathy Girl would you?)