(And I disagree that forum engagement at this point means anything in particular. Just like on Twitch, we currently show checked 140k viewers. These aren’t accurate barometers)
Forum engagement to me is level of engagement or interest in the game. I’m assuming a lot of people have stopped playing retail or are waiting for dragonflight. Retail is dead until prepatch
You’d be surprised how many people play in retail without visiting the General Discussion forums in recent years or ever. It’s not a small number.
Retail being ‘dead’ until prepatch could be said of the preceeding 2-3 months leading up to an expansion except maybe Legion (Mage Tower stuff). That being said, as others have pointed out, the 50% exp bonus is going on, maybe people are out playing and not here (I’m at work technically) .
Also, missed this in your OP: You don’t see anything on Twitter? I do, and that’s not counting any youtubers/streamers (I don’t follow them on twitter) and counting I’ve blocked plenty of WoW-related twitter accounts. Your algorithm might be acting up? Dunno.