Originally Posted by
StanSeven
Yeah, it's more what the builder does with the material than what differences exist between materials. The reason CF is used now more than anything else is that, given the same build characteristics on any specific frame, CF is lighter. Plus CF can be formed to more interesting looking and aero shapes than other materials (shaped downtubes and topsubes, stays, cut away seatubes, etc.).
Also I wouldn't worry about the life of any material. They all will last longer than you do, assuming to take reasonable care.
Another benefit to CF is that manufacturers can adjust the characteristics to each size fairly economically. So that you don't end up with a super stiff 48 and a noodly 61. CF will last. A friend of mine still regularly rides his 1993 Giant CFR-3. That's pretty good longevity for CF imo.