based on everything I have read....it is not that carbon fiber is no good or not stong, it is that it has a very unforgiving failure mode. When it fails it is all at once. Also it is more sensitive in terms of things like deep scratches. A deep scratch (through the gel coat...even hitting some fiber) can become a failure point very quickly. So the general recommendation is to be nice to the carbon, inspect carefully and regularly and make the frame art if you see any cracks at all.