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On July 21, 2026, Jack Dorsey's Block released Buzz, a free, open-source collaboration platform that looks, at first glance, like yet another Slack clone. It has channels, threads, direct messages, voice huddles, and media sharing. Anyone who has lived inside a modern team chat tool will feel instantly at home. But the familiar surface conceals a genuinely different architecture, and that architecture is the story. Buzz was not built for teams of people who occasionally summo