Ya know, since projects like @nodebb have mentioned wanting to bring in #ActivityPub federation, I realise that that could end up being a strength of AP's implementations - choosing your preferred format of discussion.
A lot of us have been lamenting the loss of small community forums in favour of Discord servers, and Discord's own built-in forums leave something to be desired.
But it's struck me that since #Lemmy/#Kbin communities are easy enough to participate in on services like #Mastodon, #Pleroma and #Firefish - Why wouldn't federated message boards be the same way?
Hell, why couldn't a message board have a forum that's just a subscription to a link-sharing community? Why couldn't Lemmy/Kbin users be able to follow a forum?
There's some exciting inter-operability ideas to be had as software grows around this standard.