Thanks, that adds a lot of good context! That concern seems less relevant to photography, since there (to my understanding) there isn’t usually something copyrightable analogous to an ongoing world/character, but is definitely relevant to the conversation. How long do you think copyright should last? Would term renewals upon addition to a canon make a difference to your opinions? Do you not think your audience would care about whether additions are by the original author?

Does the idea of shortening it to 10 years as others in the thread have suggested scare you as well?

Each jurisdiction in which it has protection

I think the value that has been produced by a single IP should be a trigger for passing into the public domain, not just elapsed time