ahhhh I bet you love malthusian doomsdayism too. The whole point of a technofix is that it is invented in the future and therefore while it does indeed not exist now it probably will in the future. The basic physics of the situation are what matters not predictions of the future and the basic physics are pretty rosy for the foreseeable future.

Really though if you want to survive for the rest of your life you should start stockpiling bikes. Expecting a bike to last for the rest of your life is short sighted. Most bikes(and parts) fail in crashes and so lifespan is usually more a factor of luck rather then material unless you are looking at racing frames.

There is so much bruhaha because certain advocates of steel cling to every possibly advantage they can think of therefore a phsyical property of steel that doesn't normally have a real world effect becomes a main talking point.