Making the fighter jet a platform where various components from various companies can work is a fairly topical issue.

There were some early rumblings that NGAD might not be a jet per se, but more like a system for building jets. This is a bit of a twist but still the same mold of problems.

Trying to figure out a way for the US military to actually own the outcome is such an interesting difficult & complex change in procurement. The right to use & modify the thing you buy has gotten worse & worse in this world, and the pentagon is feeling the jackbooted heavy foot of this new High IP regime on their neck too.