I like the idea of a slow increase over time. I remember Reddit did that one chatroom experiment where you started out small. And then merged with larger and larger rooms. Small rooms had at least a chance to hang and chat and the larger rooms turned into twitch chat spam. To a degree maybe the same could be said for comments, on Reddit now I still see thousands of redundant replies to subjects whereas here it's definitely still fresh if not shorter chains.

Though in terms of niche topics it may definitely need more traffic somehow. I think reddit benefits a lot from its search indexing and if Lemmy ever began to appear in search traffic more like forums did in early Google I could see that improving.