I think the issue here is human socialization and not twitter or technology. People love to play the "did you see what so-and-so said?" game in all its variants, and as far as I can tell this has been true for millenia. It has nothing to do with a trending topics feature I feel like there are many articles and books that attribute basic elements of human interaction to whatever platform the author was using to observ…
I think this "context collapse" explanation is really accurate, because it explains that it's not just "human nature", but it's actually taking advantage of how humans have really only evolved to have back-and-forth conversations with other people who have the same conversational context.