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BlueSky is also centralized in terms of search, for pragmatic reasons. You can search across every bluesky post and cannot on mastodon, for better or worse. I'

• AnthonyMouse 2y ago
  There is a difference between search being centralized (as in there is only one search provider) and just being indexed by third parties, in the same way as the whole web can be searched by both Google and Bing. The second one is clearly what you want for public posts, and could even be implemented locally for private posts (because then you don't have to index the whole internet, only the people you follow). It doesn't need to be centralized to work, and better if it isn't.
  • spencerflem 2y ago
    To be fair, that second model is what bluesky has. You can run another indexer, but unlike mastadon where you only have to deal with interactions to posts that involve your instance's members, with bluesky you have to be able to keep up with the entire firehose at once. So its cost prohibitive for all but big orgs. It does mean search (and as importantly, likes and comments) are globally consistent so there's def a trade off.