Status: IN
Interpreter's limitation to simple grammars (complex grammars make the pattern impractical, requiring parser generators instead) suggests a practical boundary on the recursive subsystem's most demanding client relationship: since Interpreter is a primary client requiring both Composite infrastructure and Visitor extension capability, and its own applicability is bounded by grammar complexity, the recursive subsystem's most sophisticated integrated use case tends to be limited to domains where the structural hierarchy remains tractable.
Interpreter's grammar-complexity limitation bounds the recursive subsystem's validation to tractable hierarchies
Depends on (SL): interpreter-best-for-simple-grammars, interpreter-validates-recursive-subsystem-completeness