The nexus poster on Twitter are often technically inept (journos, real life famous people, etc.). Therefore I understand the migration to Mastodon and such going slowly. But I have high hopes for the likes of federated Reddit-alternatives, since Reddit’s audience is a much more technical crowd. The only fear I have is the FOSS community’s infamous infighting over non-issues. As long as things like Lemmy or kbin are federating, this is probably a non-issue, but as soon as two or more of the major players get hung up on something irrelevant and cannot reconcile, the party is over as soon as it began.