Status: IN
ET++'s use of nearly all 23 GoF patterns within a single framework, combined with Lexi's eight-pattern composition at application scale, suggests that many GoF patterns naturally co-occur in well-designed object-oriented systems. The two examples — one framework-scale, one application-scale — illustrate that patterns from the catalog tend to appear together rather than in isolation, consistent with the idea that they form a mutually supportive design vocabulary rather than a collection of independent solutions.
Two independent large-scale systems both use most of the catalog, validating comprehensiveness
Depends on (SL): et-plus-plus-most-comprehensive-example, lexi-demonstrates-pattern-composition-at-scale