[account42]

Orphaning is less of a problem than copyright nondeterminism where someone owns the copyright but no one knows. A good way to solve this would be to also move move works into the public domain if they are no longer sold in some form. With digital distribution costs are now so low that there is not excuse to not at least keep selling something unless you care so little about it that you have no argument why you should retain a monopoly. Perhaps with a short enough term this is less of a problem though.