Ah, sorry I misinterpreted you before. Yes, these are std's abstractions to organize your Nix code and gradually 'grow' your solution. Rationale and explainers

Ah, sorry I misinterpreted you before. Yes, these are std's abstractions to organize your Nix code and gradually 'grow' your solution. Rationale and explainers on these concepts are more spread about in the docs. The 'sales pitch' is another high-level txt than the one you passed on why to use std. (PS. This cell breakdown reminded me a bit of Atomic Design for front-end UI to make that easier.)