I would like to share some thoughts about “old docs” – there are several kind of those.
A first group is the pre-Antora era. That includes the release notes and the old documentation. This has been decided about in #118 and the work has begun (at least that’s how I understood it).
If we pursue the idea of keeping the history of Fedora and the motivations for various developments reconstructible (and therefore not simply destroy old material), we should explicitly start a “The History of Fedora” page for that purpose. We can begin with a simple list of links to the migrated release notes, and then gradually expand that with explanatory text and links to other informative sources. But we can immediately exclude all the old pages from indexing by search engines.
A second group is old docs on external sites. An example is the cloud docs. It’s on readthedocs, last update 2015 or 2016, sources are on one member’s (or former member?) private site. It’s design is like the old documentation.
I think it would be something for Matthew to contact the appropriate teams and make those sites publicly inaccessible.
A third group is outdated documentation on the current Antora docs site. Pages are of different age and lack any indicator of how current and accurate they are. At least, each page should be tagged with information about the date of creation and the date of the last update. We do something like this in the Fedora Server documentation (not terribly pretty, but we couldn’t find a better way).
I suppose this can be automated by script.
Another idea (by nirik) is to let the page grey out over the years as it is unmodified. I thought that was pretty adventurous at first, but may not be so bad after all.
The biggest problem are the Installation- and the Administration Guide. There are ways to improve the current situation with with limited effort, but that would certainly be a new thread of its own.