Just my 2 cents but could be the extra 2 Billion people in the world since release. When wow came out internet wasn’t as widespread and fast as now, as well as anyone buying into wow after the 2nd or 3rd expansion might have trepidation with the sheer amount of content.
Valve says it is committed to the Steam Deck, has a "road map" (www.axios.com)
Diablo 4 Twitch viewership continues to drop as Diablo 3 overtakes it (www.charlieintel.com)