My 1990 Cannondale is still fine. It saw very hard use for the first 15 years of it's life and a bit less and maybe easier use after that. I destroyed a nice steel frame with the same level of use in just a couple years just before I got the Cannondale. I am not blaming the steel, but just saying that it is more about how well it is designed and built, what kind of use it sees, and just plain luck of the draw.