Yeah the jam band scene is still alive and mostly well. I kind of got out of it a few years ago but I'm still friends with many people in the scene. It maintains a stronger following in the Eastern and Central US from what I remember.

> On the one hand, I’m happy to see young people enjoying the music I was into nearly fifty years ago (I attended my first Grateful Dead concert in 1973). On the other hand, shouldn’t young people be into newer music?

I hear you. I'm overjoyed to see young people listening to classics but wonder when the next Jerry, Zappa or Jimi will emerge. The music world is much more image conscious than it was then, however(video killed the radio star...) and the market is much more fragmented now. That said, there's a ton of great new music. It's hard to tell with my old ears what music now will have the staying power of the music we love.