If people wanted the community feeling back, they’d go back to old-school forums. They have few content-discovery mechanisms (limited search, no post rankings, no reblog mechanism, chronological post ordering), so your experimental content has the same chance to be seen as the popular stuff, and they have easily-created subcommunities. I’ve seen long-running threads develop their own community feel. Forums were built for that exact purpose; they don’t facilitate content aggregation and sharing like modern platforms.

There’s nothing stopping everyone going back to forums, except that when it comes down to it, people seem to value being able to share/see/rank content easily more than they value a sense of community.