And there is a different copyright (rather than on the text or video production) - the copyright protection for fictional characters.

https://en.wikipedia.org/wiki/Copyright_protection_for_ficti...

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For Linux, the "every contributor" might be true.

For a lot of other projects, they've got a CLA in place. https://www.mongodb.com/legal/contributor-agreement

(a) Assignment. By submitting a Contribution, you assign to MongoDB all right, title and interest in any copyright you have in the Contribution, and you waive any rights, including any moral rights, database rights, etc., that may affect our ownership of the copyright in the Contribution.

When does MongoDB die? Jokes aside, whatever the answer is, as long as it is longer than any contributor, that's an out.

Consider also the "I don't know who you cookiengineer are, therefore I assert that you're dead and the copyright on your previous comment has expired and I'll just slurp this up into an LLM training model."

https://www.law.cornell.edu/uscode/text/17/302

(c) Anonymous Works, Pseudonymous Works, and Works Made for Hire.—

In the case of an anonymous work, a pseudonymous work, or a work made for hire, the copyright endures for a term of 95 years from the year of its first publication, or a term of 120 years from the year of its creation, whichever expires first. If, before the end of such term, the identity of one or more of the authors of an anonymous or pseudonymous work is revealed in the records of a registration made for that work under subsections (a) or (d) of section 408, or in the records provided by this subsection, the copyright in the work endures for the term specified by subsection (a) or (b), based on the life of the author or authors whose identity has been revealed. ...

(e) Presumption as to Author’s Death.—

After a period of 95 years from the year of first publication of a work, or a period of 120 years from the year of its creation, whichever expires first, any person who obtains from the Copyright Office a certified report that the records provided by subsection (d) disclose nothing to indicate that the author of the work is living, or died less than 70 years before, is entitled to the benefits of a presumption that the author has been dead for at least 70 years. Reliance in good faith upon this presumption shall be a complete defense to any action for infringement under this title.

It is certainly reasonable to argue that 95-120 years from its publication is too long, but the copyright your comments (and other works) do not require me to dox you to determine if they're expired or not.

Having copyright on anonymous or psuedoanonymous or being able to assign copyright to another entity are incompatible with copyright expiring upon the death of the author.

Resetting that number back to 50 years as covered by the Berne Convention would be a good thing. https://en.wikipedia.org/wiki/Berne_Convention#Term_of_prote...

Having it be less than 50 years implies that the United States would be leaving the Berne Convention (signed by 181 countries) and that would put the United States in very small group of countries that do not recognize any intellectual property laws https://en.wikipedia.org/wiki/List_of_parties_to_internation...

Trying to change the copyright to a very short period implies that the United States would be leaving the Berne Convention and TRIPS and the WTO and would go about trying to renegotiate those treaties with about 200 countries all over again (and getting those treaties signed by congress)