The same sentence that Lisa quoted is the same one that jumped out at me. Of course Carbon dealers are going to tell you that...

Anyway, my lbs will never ever sell me something I don't need. I asked about steel and rusting and he told me that it would probably take something like 50 years for a frame to rust to where I couldn't ride it if I didn't take good care of it, and was I going to keep it that long? He didn't even recommend frame saver since he didn't think it would "save" something that didn't need saving, but that's him. It couldn't hurt.

Going on 3 years with my Surly, not a spec of rust anywhere.