I'm amazed at all the rare-earthers that have sprung up. The last time I argued this on FR I was shouted down.
My guess is that the radio civilization will last a couple hundred years, being replaced by who knows what -- entangled quantum particles, perhaps? So the window for crossing paths via SETI is brief indeed. I suspect that live, biological humans will never travel to the stars, although our descendents might.
One factor is that Sagan is gone and silent. The pendulum has swung about as far as it is going to. It's still way over on the ET side, but more "we might be alone" voices are being heard recently.