Folk is and was principally about folk. If they don't survive then folk music won't.

If the commercial end of the genre cannot be supported it is sad but not not the end of Folk World. We need a full spectrum for our enjoyment, not for survival. But even in hedonistic days of the "me generation" folk survived, and in the upshot of the hedonism, our glorious depression, people will discover the delights of actually doing things for themselves.

Though the twists and turns it takes as the influx of newbies come in with their new-fangled notions may be a shock to us. Make that - "will".