P.S. I note in the linked-to article,
https://writing.kemitchell.com/2019/03/09/Deprecation-Notice.html,
Several lawyers came together, in GitHub private repos
And indeed there seems to be no public record of this drafting
process, at least not one that I could find. This seems diametrically
opposed to much of the philosophy underpinning copyleft-next and its
development, expressed in part as the Harvey Birdman Rule:
https://raw.githubusercontent.com/richardfontana/hbr/master/HBR.md