It’s a good idea to know the history of US copyright before answering this question.

As far as my answer, maybe 10 years. Even then, all content is remixed and remastered, so I don’t really see a point to copyrights at all. Anything that relies on copyright are a part of incredibly incredibly oversaturated industries, so people should just make what they are passionate about, and not worry about whether some dude decides to rip it off to create some other thing. Imitation is the sincerest form of flattery, after all. Jazz musicians certainly don’t give a shit, and people have been stealing the Amen Break for decades.

People are too damn concerned over trying to be rich and famous from whatever idea they foolishly think is unique. Every melody has essentially already been created, and if it hasn’t, then AI and LLMs will take care of the rest. Create art because you like to create art.

The problem is the work-to-live death spiral. Install UBI and abolish copyright.