The DARPA Carbon Crunch program stands out as particularly compelling in this issue. The bottleneck in carbon-carbon aeroshell production for hypersonic systems has been a known constraint, but framing it as a manufacturing speed challenge rather than a materials problem opens up new solution pathways. What's interesting is DARPA's explicit exclusion of parallelizing existing methods—they're clearly looking for a fundamentally different approach to densification. Given the multi-year timeline typically required for current processes, any breakthrough here could have significant implications for scaling hypersonic vehicle production across both offensive and defensive applications.