Status: OUT
Expert OO design achieves governed variation: SOLID's unification of variation management and expert judgment provides the governance framework while the four-dimensional modification space provides the complete territory that judgment must navigate, yielding design that is both systematically flexible and principled.
Depth-8 — merging judgment's coverage (depth-7) with SOLID's unification of variation and judgment (depth-7) closes the loop between what must be governed and the mechanism that governs it
Depends on (SL): solid-judgment-spans-modification-space, solid-unifies-variation-and-judgment