(You know, for the casual reader to click into for basic info, perhaps just to peek at what the heck this macro does anyway, or to behold the new documentation with new behavior described, or just to see an example…)
(Seemingly also relevant would be when a section of the manual proper can be linked, for example in the 1.5 Release Notes item on the new implicit kwarg names thing: a reader might enjoy referring to the manual section for examples and context… without having to find it.)
It would be great if someone wanted to fix up the NEWS entries with links to the relevant docs. This is mostly not there because it’s a fair bit of work to add.
In general there’s a tradeoff: the more requirements you make of people who write cool new features, the less cool new features you’ll get. To me, making something like this mandatory seems very much on the wrong side of that tradeoff.