For music startups, this could make music licensing even more of a mess than it already is. Imagine negotiating separately with every artist in your catalog. I know that to some extent separate negotiations already happen for the biggest artists, but further disaggregation of the rights can only make it worse.
Maybe over the next 35 years, everyone will reclaim their copyright, form a syndicate, and collectively license them on reasonable and flexible terms! I can dream, right?