Greg, the examples you gave are very specific musical styles. Folk music encompasses a variety of styles under it's umbrella. I do think that you will find a bit of barber shop, jazz, etc being booked in venues today, but they are more of a novelty - just as they were 50 years ago.

"Rock'n'roll" has similar issues. Justin Timberlake was booked to open for the Rolling Stones in Toronto. Rock, pop, or ??? Would you book a punk band on a bill with Lynard Skynard?

Folk music is a bit more accepting, and I don't think the trad. vs. singer-songwriter issue that we are discussing reflects the scene as a whole. Yes, there are numerous festivals that cater to only one style of "folk" music, but I question how long they will last.

As to Black Walnut's suggestion that we label it "old" and "new" - that will never fly.   I can't imagine any performer would willingly accept the term "old folksinger".   Folk music is SUPPOSEDLY timeless.