I say CCA for runs because runs are expensive, and my wallet don't like expensive, and I say OFC for amps and speaker wire cause you only need a few ft for amps, and speaker wire isn't expensive. Both types serve a purpose, that's why they exist, yes I know Copper is more conductive, but is the extra cost worth it, not really when quantity is require. I agree with TeamHT as well
I myself would put the extra work of doubling up the runs in cca instead of working extra hours at work to pay for the ofc because it hurts my wallet. I do love the fact you can 150 ft of cca for the cost of 50ft of ofc, and have it transfer more current.