Status: OUT
Composition's doubly-grounded scalability operating within the Prototype-Flyweight identity spectrum is safely operational only while Decorator's object identity breakage does not corrupt the identity-dependent sharing mechanisms — Flyweight's factory-managed caching and Singleton's instance control — that define the sharing-optimized boundary of the scalability spectrum upon which composition's practical efficiency depends.
Decorator identity breakage can corrupt the sharing mechanisms bounding composition's scalable end
Depends on (SL): composition-scalability-doubly-grounded, identity-spectrum-bounds-composition-scalability
Unless: decorator-breaks-object-identity