Basically the same finding as the controversial Zurich paper on using LLMs to change opinions in the "change my view" subreddit
Social media has turned into cancer. It'd be riveting to watch it turn into bots talking to other bots. Social media wouldn't go away, but I get the feeling people will engage more with real life again.
As the platforms see less growth and fewer real users, we might even see a return to protocols and open standards instead of monolithic walled gardens.