@evan @Mushi it seems to me ATProto’s descentralization is mostly theoretical (it is not realistic for a person or a small organization to run the main aggregator service and indeed no one but bluesky does) whereas for ActivityPub is not only possible but a reality.
If Bluesky were to dissapear today, all the self-hosted PDS instances would be rendered useless immediately. If Threads or the biggest mastodon instances closed today, the fediverse would still be alive and kicking.