Coming back to the original topic, there is another thread on the.socialmusic.network about the interop between @discourse,@nodebb and MBin, which raises a couple of UX issue to be ironed out in forum federation.
One is a variant of the same one we stumbled on in this thread. How to accurately communicate where a topic started, and where subsequent replies come from. Then there's that old bugbear of fediverse threads, missing steps in the staircase of the conversation;
"I can see this post from completely different software (Mbin), so that's cool, but I don't see replies from 'social music network', and for some reason it thinks that fedimusic community is on forum.wedistribute"