>They last a lot longer so they're cheaper in the long run.
Well, that is relative. In my hands money does not seem to last long, regardless of the material :)
"The five senses obstruct or deform the apprehension of reality."
Jorge L. Borges?
"Premature optimization is the root of all evil in programming."
Donald Knuth, repeating C. A. R. Hoare
"To die for a religion is easier than to live it absolutely"
Jorge L. Borges