Just watch for cracks or crazing around high stress points. (Head tube connections, bottom bracket, etc.) It should be fine. Carbon fiber assemblies probably never WEAR out. The polymer resin, however, does have a life span. Eventually, it will fail. Exposure to oil, UV, and heat, and maybe salt are all accelerants, depending on the type of polymer used. Two part tube type epoxy from the hardware store, for instance, can start to depolymerize in 5-6 years, and faster with heat. Fiberglass boat hulls last a lot longer, as long as the gel coat that protects them is intact. There are now carbon fiber airplane wings and helicopter rotors, though there is probably nothing as closely inspected, nor as often. It's probably not an issue to worry about, but, at 25 years, you probably want to pay attention to inspection a bit more. Just my $0.02.