If users try to find relevant docs on a topic and start on our docs site, they can encounter outdated documentation. It would be great if the docs list would contain the date of the last update, and even better, also the day it was last checked by a dev and seemed correct/valid. Reproducible: Always
They do. Look in the top right corner of the right column. There are also version numbers in the document's source code. If you find something that's out of date, just report it as a bug on bugzilla.
I'd like to point out that i wasn't speaking about the actual doc pages, but about placing the last-change-dates into the *list of all docs*, next to the link to each doc ... see http://www.gentoo.org/doc/en/list.xml?desc=1 Also, now that you mention it, the "Updated $month $day, $year" string in the top right corner could link to the source of the document's revision log.
please ignore "source of the" in "source of the document's revision log"
That string will be going away once we move to git, which I still intend to do shortly. I don't want to clutter up the toplevel index with anything else besides content summaries.