Honestly, large-scale composites are actually cheaper per unit dry mass than metal 3D printed parts. Composites may be more finicky, but they're not necessarily more expensive in aerospace!
Carbon fiber composites are more expensive than stamped metal parts like automobile bodies, but if you're talking CNC machined or 3D printed metal parts, then carbon fiber can indeed be cheaper.
Carbon fiber composites are more expensive than stamped metal parts like automobile bodies, but if you're talking CNC machined or 3D printed metal parts, then carbon fiber can indeed be cheaper.