That's an interesting point actually. Maybe there should be multiple stages to copyright expiry, where the opportunities to create derivative works open up over

That's an interesting point actually. Maybe there should be multiple stages to copyright expiry, where the opportunities to create derivative works open up over time, without the work itself entering the public domain just yet. Derivative works are where most off the societal value lies. Something like videogame publishers owning any footage of their game being played is absurd.