b4icu,
Getting thicker or shorter or both, above that optimum, would cost more, but not be of any sonic benefit (improvement).
If we forget about cost/benefit ratio, or the total price altogether, would getting thicker and/or shorter cable than necessary (optimum) be detrimental to the sound?
I have no idea how thick 0 AWG really is but would be willing to follow shadowcat2016's example for the fun of it.