a₀(z) = a₀(0)·(1+z)³ᐟ² Higher substrate density at early times Lower Jeans mass 44× smaller at z = 11.4 Faster collapse ~17× at z = 11.4 Deeper potentials 6.6× stronger g_eff More structures collapse Assemble mass faster Higher star formation JWST "impossible" galaxies Massive, luminous galaxies at z > 10 Expected in the substrate framework