Having sponsored a few cycling teams over the years, teams/riders want a work-horse frame that will have a better chance of surviving crashes. They don't want to be spending sponsorship dollars buying frames all the time. The full aluminum frame is always a go-to frame. We ended up developing an aluminum frame with carbon seat/chain stays that received a lot of praise from our riders due to its resiliency after crashes.
I would stick to aluminum or AL/CA frames. I don't like crit racing my full carbon bike due to the crashing risk. I still do, but not as much as I used to (because I'm broke.. haha). When I had my full aluminum bike, crit racing was even more of blast. I don't know why, it was just more fun, and my results were better.
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