The PLC comes up a lot, and I understand the criticism, but it is also good enough for now and on the right trajectory, though the pace could be better, hut like much of the Bluesky development it has molasses in winter vibes. Long-term, multiple identity authorities can exist. Something like Handshake would have been ideal, another great project doomed by poor leadership.

Supporting delete is a good decision in my opinion, and likely a legal requirement. I also like that ATProto stuck a balance between decentralized and user experience. Properly federated systems are unlikely to appeal to the masses, re: blockchain.

Two other well designed parts of ATProto are how the algos and moderation work. Modular, composable, and anyone can participate. This would change with a properly permissioned protocol (zanzibar + macaroons imo) and encourage smaller social instead of big social.