I have looked up hashtags of stuff (can't remember what they are now) and seen posts from months ago. Those users tend to have stopped posting (or perhaps moved to other npubs). But yeah, it seems like there's people who want to talk about other stuff, aren't finding any/much engagement, and potentially leave for good. Or they give up and join the chorus of bitcointwitter sloganeering.

A forum/topic focused client may help with this. Although I suspect it may be a similar problem maybe?