Some of you are missing the point. Can you name a technology that hasn't improved over time? Or mass produced items that increase in price? Just cause you can't do it now, doesnt mean you won't be able to in the future. When was the last time you took a stroll through Lockheed Martin's R&D department?
Also, the point that a firearm won't last as long as metal hasn't much to do with this dicussion. Sure, it won't last AS long, but work it will.