Ok but how many parts needed to be replaced on that 1911 before it reached that point?
You have chosen one example of a poorly designed pistol (if it wasn't poorly designed they wouldn't have redesigned it) to illustrate why you don't like polymer. Simply put a Glock or any other of these modern pistols (by the major brands) last significantly longer with less stoppages than a original 1911. There is a reason they are replacing the 1911s and other metal framed pistols. In fact their design has lineage to the 1911, just done in a smarter way (locking on the chamber instead of rings on the barrel).
I'm still a revolver guy here so I don't need to worry about polymer anytime soon.