I’ve just encountered this again today - and I really want to disable threading for DMs by default. But can’t!!!
The vast majority of our DMs (including group chats) are well served by a single thread. Occasionally threading would be helpful, in which case we can turn it on for that chat conversation.
The present default seems bananas. I agree with Sam!
Has this fallen off the radar? I note that there are 7 votes on this Topic (which is quite a few in this category).