Einstein’s General Relativity describes gravity as curvature of spacetime produced bymass-energy. The coupling between energy density and curvature is extremely weak,implying that spacetime behaves as an extraordinarily stiff medium. While this stiffnesslimits large curvature distortions, it may also allow small structural perturbations to persistonce formed. The Space-Phase (SP3) framework proposes that repeated flux of matter andenergy may condition the spacetime substrate, producing persistent transport pathwaysreferred to as coherence corridors. This paper examines how the extreme stiffness impliedby Einstein’s field equation may permit the long-term persistence of such subtle structuralorganization.