Given that there will be a website called diff.wikimedia.org according to T254367 , https://meta.wikimedia.org/wiki/Wikimedia_Blog and its subpages look quite outdated.

Related, the editorial-guidelines page on the Diff beta site says to contact diff@; "Learn more" on the very same page links to https://meta.wikimedia.org/wiki/Wikimedia_Blog which say to contact talktocomms@ instead; https://meta.wikimedia.org/wiki/Wikimedia_Blog/Guidelines says to contact digitalmedia@ instead.

The "Guidelines" page on meta also duplicates/collides with the editorial-guidelines page on the beta site.