It is used quite a bit in the space industry already. But it is more expensive so it is usually confined to applications where you really need the weight saving

It is used quite a bit in the space industry already. But it is more expensive so it is usually confined to applications where you really need the weight savings, or you need something with a more controlled coefficient of thermal expansion. Thermal expansion of carbon fiber is small so you get less mismatch when you use it with things like optics or as part of solar panels. And a common place you find carbon fiber in the space industry is actually carbon fiber skinned aluminum honeycomb panels. Very light and very stiff. https://www.rockwestcomposites.com/shop/plates-panels-angles/sandwich-panels/honeycomb-core-sandwich-panels https://www.rockwestcomposites.com/shop/plates-panels-angles...