This is a valid question, IMO, for carbon bikes that are vintage now as well as ones that will be vintage in time (aka the ones made today). The scrutinizing is still the same in any case, but I think it's more important with carbon. I don't know but...I'll be looking at that stuff from now until whenever. I just have to find that perfect combination of condition, looks, and height/"tall enough" with "tall enough" being the tallest order. Seems a number of carbon frames were designed to look great at 56cm give or take, and by the time 61-62cm are reached, they are pretty ugly.