Evaluating Den - A Dendritic Configuration Framework

I am currently rewriting again my infrastructure repository, now renamed drupol/infra, and documenting the work on an ongoing draft pull request: #124. After my previous rewrite based on a feature-first mindset, I wanted to push the architectural concept further using vic/den, a Nix framework built around aspects, context transformations and dendritic pattern. The short version: Den is impressive, genuinely powerful, and intellectually satisfying. However, while experimenting with it in a real infrastructure, I ran into an architectural constraint that feels deeper than any specific framework.