Elon was running some sort of $1m competition for the “best” Twitter post for a few months. I think those type of dissertations about Phrenology and the like have fallen off a cliff since the competition ended.

There's probably a selection bias involved. I haven't been a regular user for a while now, but the big threads like that were significantly outnumbered by individual posts. Meanwhile I'm not likely to send a link to someone of a single single-sentence tweet, because there's not enough meat to it. The stuff that could be shared would usually be an image from the tweet, which I could share directly.