Status: OUT
Module autonomy is the structural precondition for per-use-case cost optimization: because each module independently chooses its error conventions, eviction timing, and safety boundaries, it can also independently select the optimal write-read cost allocation for its specific access pattern — autocomplete and leaderboard pay at write time for read-heavy workloads, while payment and URL shortener defer to reads for write-heavy or low-frequency paths — without cross-cutting constraints imposing a uniform cost model.
Per-module convention independence is what allows per-module cost model independence
Depends on (SL): module-autonomy-spans-conventions-and-safety, write-cost-allocation-matches-access-pattern