The fact that you can run out of fediverse content. After 2 hours on Lemmy, I have functionally read all of Lemmy
I’ll add that if you are running out of things to read you can instead post content you want to discuss. I’ve found that much of the time there are people waiting to jump in and comment, they just aren’t in the habit of making posts. Which you didn’t need to do on other sites because there were always enough people posting content. And it’s less likely to leave you doom scrolling since it’s a good opportunity to stop since comments won’t come in immediately.
I’ll add that if you are running out of things to read you can instead post content you want to discuss. I’ve found that much of the time there are people waiting to jump in and comment, they just aren’t in the habit of making posts. Which you didn’t need to do on other sites because there were always enough people posting content. And it’s less likely to leave you doom scrolling since it’s a good opportunity to stop since comments won’t come in immediately.