The Bob Dylan appreciation thread

By your definition of folk I would argue that "folk" (acoustic guitars, voice) is no longer folk, because "folk" does fit into a particular period and that period ended before the end of the sixties.

The cliched idea some people have of 'folk' i.e the style you describe, is still folk. Nothing is ruled out or in as a result of it's superficial appearance, but by the function it performs, i.e communicating a narrative about people.