What about discord threads?
More a way for already engaged users to start another conversation while in the same channel. It doesn't serve the same purpose as reddit.
Regardless of anything discord does, the lack of searchability will always be a core problem compared to reddit.
It just doesn't fulfill the same purpose. IME, I ignore discords from most subreddits because they do basically nothing for me unless it's a topic i'm extremely interested and engaged in.