From my limited experience, it seems that almost everyone has a very new bike: manufactured in the past two or three years with high end equipment. I'm wondering if racers in general purchase bikes every few years or if they tend to just upgrade components/wheels.
Do people usually get rid of their older bikes or do they keep them? Would you buy a used bike and race on it? I feel that people that race and train seriously put a lot of miles on their bikes/wheels but it still seems difficult to find reliable places to purchase used equipment. Maybe because they are more prone to crashes and damage?
I'm also surprised that there aren't more bikes on the road that are 5+ years old - do they turn into trainer/beater bikes? Do racers get the upgrade bug and have to buy the latest bike? I know with 11 speed being relatively new maybe there was an influx of new purchases recently, and it's going to level off in the next few years.