Status: IN
The extension mechanism spectrum (Decorator/skin, Strategy/guts, Template Method/skeleton) reveals a directional preference: composition-based mechanisms (Decorator, Strategy) are systematically superior to inheritance-based ones (Template Method) for run-time flexibility, confirming that the GoF principle favoring composition over inheritance applies specifically to extension strategies.
The extension spectrum (depth-1) evaluated against composition superiority (depth-1) shows a directional convergence
Depends on (SL): skin-vs-guts-extension-spectrum, composition-superiority-for-reuse