I went back to the oldest release note available on the new devhub, release note 327, and there is eleven items that are still marked as “Pending”. This release came out almost exactly a year ago. I have a pretty good feeling that these features have been released, especially since they were posted a year ago.
These release notes definitely should be updated (or at least add a notice that they are not being updated), as players who stumble across these in the future could get super confused as to why release notes posted over a year ago are still marked as “Pending”.