I have extensive experienece with carbon fiber vs alloy aluminum for structural components under heavy load. Specifically in critical components such as hang glider frames. I have many times put my life on the line with them in that sport. They are strong and reliable... until they are not. When they fail, the consequences are generally been dire. This happened to two of my free flight friends. They died.
The problem is that carbon fiber components are extremely difficult to inspect for tell-tale structural failure. With aluminum, for most spars, we see micro crazing then small cracks. They grow as the structural intregruity deteriorates.
I no longer fly or use carbon fiber for life safety applications. The reason is that the inspection technology to ensure they are still safe to use is way way beyond what the average owner can do at home or in the field.
GJ