@arichtman @jakehamilton You beat me to it, but since I gathered the links...
Based on @samueldr 's "Nix Flakes is an experiment that did too much at once…" https://samuel.dionne-riel.com/blog/2023/09/06/flakes-is-an-experiment-that-did-too-much-at-once.html and the fact that npins only resolved one if those problems, I _was_ going to ask what you recommend for the other five things that flakes attempt to solve, but now I know your answer is #Nilla.