"I would be puzzled by someone playing Ava Max's "Sweet but Psycho", no matter how much I like it!"

So would I.

Mind you, Talking Head's "Psycho Killer" quite often turns up in "folkie" sessions and I've heard it performed by bands and solo artists alike.

To me, it's not what I'd think of as folk music by any stretch of the imagination although I've always liked the song.

Mind you, I don't know how much of the material which gets introduced is just an an old folky's way of trying to convince the younger generation that he/she is still "in touch" ... i.e. like Gordon Brown claiming to be an Arctic monkeys fan...   as opposed to a conscious effort to introduce a new song into the folk tradition?

Last year at Linlithgow Festival, one of these old "bald, pony tail and earring" strummers even treated us to George Ezra's "Shotgun" which was very high in the charts at the time. Another good song but not necessarily one that we need to hear in a folk club or singaround.