My big take away is that social media as we know it is likely generational. Like real time broadcast TV, it may just not be a thing at all in the future, at least not with the centrality we’ve become accustomed to.
Polls run here and especially on masto bare this out. Mastodon, for instance, leans x-gen/boomer with some millennial in its demographic. It’s hardly a young persons thing. Once you realise so much of the praise and enjoyment of the Fedi is that it reminds people of the older days of the internet, the generational picture becomes pretty clear. 15 year olds today were born after Twitter, Facebook and YouTube. Forums, Usenet, old Twitter are probably like black and white tv to them.
At the moment, I think it’s a major flaw of the Fedi, that it’s fundamentally backwards looking, trying to preserve older big-social designs rather than doing something more diverse or at least different.
An obvious example being private or closed spaces like group chats and the like including public versions if desired. This seems to be a growing form of online interaction, that is in a way more humane or eusocial. But apart from matrix, which sits separately, the Fedi is still stuck redoing Twitter and Reddit.