I, for one, am glad to see improvements being made in composites. Along with all these applications...it does amazingly well for prosthetics as well.
I trust my well being and safety to a big chunk of carbon fiber socket and what has so far been an absolutely amazing plastic foot for the past several years. I am glad to report that it hasn't given any issues and look forward to a later generation that is stronger without the need for the thickness and weight.
In my years walking on these things I have had one break, and it sort of crumpled and stretched, thank goodness. My cycling leg has been through a couple of crashes and still going strong.