Ouch, Severn!
Just OUCH! ; D

But serially, fo'ks,
Villan may prefer Kate Wolf's accompanied songs (usually accompanied by the fantastic Nina Gerber, no less) to her a cappella "Lilac Bush and Apple Tree," but does that mean that particular song would sound better with, say, guitar backup?

The two YouTubes you linked to, Villan, I think well exemplify how some performances really need nothing more than really good human voices.

And I'd submit yet another:
Old Dollar Mammy: Barry Finn

Anyone really think Barry needs a instrumennal backup fer this 'un?

I don't.