Status: OUT
SOLID combats software rot with defense in depth: its composition grounding addresses rot at the mechanism level (LSP→DIP→OCP enabling extension over modification) while the comprehensive variation taxonomy with axis escape addresses rot at the design space level (ensuring every aspect that varies has a pattern to accommodate it) — together providing layered defense against rigidity, fragility, immobility, and viscosity through both principled mechanisms and comprehensive pattern coverage.
depth-6 defense-in-depth claim combining mechanism-level and design-space-level anti-rot coverage, gated on the requirement that DIP is applied thoughtfully
Depends on (SL): solid-combats-rot-through-composition-grounding, variation-comprehensive-with-axis-escape
Unless: dip-overgeneralization-pitfall