This goes back to the questions I asked before. On the fediverse, we'd isolate the bulk of them from the greater network by suspending their host servers. Does #Bluesky provide tools that allow admins or individual accounts to completely exclude everything from a specific server? Will the indexing servers defederate from known nazi havens? Will the algorithms serve posts from nazi accounts so long as they don't trim the ML flag for hate speech? So many unanswered questions.
If #Twitter does merge into the network, my guess is it will (a) happen fast — like, within the next year, and (b) put an end to the social media reshuffling phase we've been going through since October. #Bluesky instantly reached critical mass; people will get to use "Twitter" while credibly maintaining they're not on Twitter. No fediverse project will be able to count on growth by matching Twitter features. Better to start focusing on what differentiates fediverse services from Bluesky.