Re:SocialHub federation. Discussion fragmentation may be one of those downsides. There's more fragmentation now, because microblogging has become the primary way to discuss topics. And microblogging is super fragmentary and fleety, and only reaches whomever is mentioned and how it then randomly disperses by boosts. There may be easier access, at the cost of less community.
I don't know the prio's on forge federation, but there's activity.. https://codeberg.org/forgejo-contrib/federation