When the Power Tubes Run Out

A lot of you have nice amps that essentially require quality NOS tubes. Do you have any plans about what you are going to do when you get cut out of the diminishing tube-trade loop? Or are you like Dubya?...By the time tubes run out someone will have thought of a substitute. I don't see a sub of equal quality on the horizon. No one is insane enough to spend the money in order make them like they used to for such a small market. And even if they did, the price of those tubes would make the NOSes look like a dime a dozen. But maybe i'm wrong.

So SS for you, then? *Cringe*, i'm sure:) Any idea if or how the industry (e.g. high-end tube amp manufacturers and/or SS companies) will respond when the supply becomes critically low?