I did, when I tried going over there. The discussions definitely felt... redditier, in a bad way, to me. More immediately jumping to rage and personal insults.

But mainly the problem as I understand it is that lemmy.world has open sign-ups, whereas beehaw.org has strict, admin-approval sign-up. Beehaw.org was getting flooded with users from lemmy.world and sh.itjust.works who got in through their open sign-up and were then coming into beehaw, being assholes, and creating too much moderation work for the tiny volunteer mod team - they couldn't moderate such a large and unregulated influx well enough to preserve the safe space or community feel of beehaw communities. Especially when banned individuals could just make new accounts and come right back again.

There was another post though where they said they've talked to the sh.itjust.works admin and are likely to work something out with them in the future to allow for re-federating, though not yet. But that the lemmy.world admin (at the time of the post) had not responded, iirc.