Late in 2019, Twitter CEO Jack Dorsey floated "Project Blue Sky," a plan for an interoperable, federated, standardized Twitter that would let users (or toolsmiths who work on behalf of users) gain more control over their participation in the Twitter system. This was an exciting moment for us, a significant lurch towards an interoperable, decentralized social media world. We were especially excited to see Dorsey cite Mike Masnick's excellent Protocols, Not Products paper. It’s been more than a year, and Twitter has marked its progress with an “ecosystem review” that sets out its view of the landscape of distributed systems. The world is a very different place today, with social media playing a very different role in 2021 than it played in 2019. Locked down, with the legitimacy of the US political system under threat, with social media moderation policies taking on national significance, the question of how a federated, decentralized internet would work has become even more salient...and urgent.