"I am so glad you came along; I thought the songs would die out," could be an argument in favour of the art song performances of folk songs. At least someone is singing them.

Mary O'Hara's style of singing isn't my favourite, but I learned a lot of songs from her. (and I do think in some ways, timing and phrasing, she stays true to the origin of her repertoire)

Margaret Kennedy Fraser made parlour room arrangements of Gaelic songs collected in Scotland, but she also published the Gaelic texts of the songs and so produced a useful resource.