When I was a kid I learned all these old songs in what was considered the traditional style, like this version of a Jacobite song by the great Ewan MacColl.
But then by the mid to late 70s, in Ireland, Scotland, England & America there were younger guys who interpreted these old songs in new ways. You can hear the influence of rock rhythms and a new energy that won a whole new generation of young people to this music and breathed new life into these old songs.
Could not be explained better
Go back to the tradition and and have inspiration