To add to Frank's response, using only procedurals will indeed save resources, because it will replace the maps with procedural shaders that use very little ram ( but need more computation than textures when render time comes).
The enhanced method uses the maps and adds nodes, as Frank said, but it also can save resources, because it collapses textures, for example for V4, you have many body part textures, SV will create a single one for body, arms,hands, legs & limbs, so it will save some resources this way.
The 3rd option is toon lines, with many cool filters for animé and sketch style renders.