the problem is a lack of ability to recognize worthwhile content, a lack of critical consumption. there is also be a problem to find good content among the mass of junk. but that's already a problem now. i have mostly given up. i find new content mostly through HN.
the problem will be that a lot of good content will remain undiscovered.
so let me make this claim in response: the next big social media platform will be the one that will make it easy to discover actually good content as opposed to popular content.
But none of our personal experiences is a great indicator of what "most people" do.
84% of people aged 18 to 29 use at least one social media site.
That's what I mean by it not being feasible. Technically, there are many, many ways to make this happen, but they all come with very serious problems that I don't think most people would accept.
On the other hand, people accept things now that just a short time ago were considered outrageous and unacceptable by the majority of people (in the US, anyway). I maintain hope that this descent will stop at some point, and that hope is likely coloring my expectations.
Which is a thing that I don't think is feasible. I could be wrong, of course. But I do agree that authenticity is going to be the issue that social platforms will live or die on.
I think the next evolution of "social media" is more likely to be a return to the old-fashioned notion of interacting with people in person.