> quickie comments on HN should be taken more as mental stimulation and kickoff points for further discussion

Agreed, and my comment was aimed at exactly that. :)

An example of my concern: What would happen to GPL-licensed software if the copyright expired quickly? Would that allow someone to include it in a proprietary product and (after the short copyright term ended) deny users the freedoms that the GPL is supposed to guarantee? I think those freedoms remain important for much longer than 10 years.

> (and no changes since remember, it's a constantly rolling window)

Do you mean that the copyright term countdown would reset whenever the author makes changes to their work? (I'm not sure if this is the case today.) If so, couldn't someone simply use an earlier version in their proprietary product in order to escape GPL obligations early?

> "if you're releasing under an open source license and thus giving up your standard first, second, and part of your third period of IP rights and monopoly, you're excluded from needing to pay a license fee because you've already enable the public to make derivative works for free for decades when they wouldn't otherwise anyway."

Yes, I think this makes sense. Thanks for sharing your thoughts.