I think it's getting perilously close to us needing another short snappy word to describe the traditional stuff. There was a sizable percentage that didn't come anywhere near even the widest meaning of 'folk' though to be fair they keep tagging on words like 'roots' and 'acoustic'. Perhaps it would be more accurate if they just called it 'music'.

I think they're moving towards calling it FARB music: during the programme I heard at least once the phrase, "Folk, Acoustic and Roots-Based music"