Discord is groups > channels > messages but doesn’t use threads (I believe).

MS Teams is groups > channels > threads > messages

But yea this does feel like forum arrangement. Which is really the most useful format for longer term conversations. Discord is great for “today and tomorrow matters yesterday doesn’t (yolo).

Discord has subchannels, which it calls threads

Team's threads vs messages are so similar users often don't understand them

No one has usenet style threads yet

Wavelength’s threading feels Usenet-y to me.