pfefferle, I just attended the "ActivityPub Based Forums and Threaded Discussions" call, and I really like their work on standardising the way, how forums federate.
https://github.com/swicg/forums
Maybe we need something similar for blogging platforms.... /cc @help @write_as ghost
But I think I'll lurk around the #threadiverse community for now.... it's technically very similar... you have a post and reactions...