Thought: A social media platform where, instead of being directed by an engagement-driven algorithm, or shouting into a void and hoping someone listens, one in which posts are replies by default. These replies could be weighted positively ("pull") or negatively ("push"), and based on who you pull, and to a lesser extent, those pulled by your pulls, etc., your feed is populated.
The idea would be to help create actual connections via social media. It could still, I think, work with
#ActivityPub, maybe as a fork of Friendica.