What might be productive is if Folk (of whatever sort most of us would recognise) were played on "normal" radio shows -- Wogan and the like. People with no experience of Folk would get exposed to it, and some of them would find they like it. That way, Folk would be on a footing closer to that or conventional music, and might well become more widely popular. Nothing wrong with specialist Folk shows (if we had any), but they only preach to the converted.

Steve