I meant threading in as much as the connections or links between message data

All discord needs to store is:

{ channel_id, message_id, user_id, content, reply_to, datetime }

these days they added an extra thread_id field, sure. But the data itself is blisteringly uncomplex and there is only a single way to display it (ordered by time, i.e. the 'thread')

I think parent meant threading as in message threads.

Just recently Symphony switched order in which I have received two messages from a colleague. This completely changed the meaning of the message and we got in an argument that was only resolved after I have posted screenshot of what he wrote.

It seems, the threading might not be that simple after all.