Rocksky and protocols.
Interesting to watch projects like Rocksky, Pinksky, Skylight to move forth building replacements for proprietary walled-garden social networks but on top of the ATProto protocol powering Bluesky. In some way, this approach (building new applications that work on top of an existing datastore - the PDS - and this way also somehow maintain compatibility to each other and provide users running their own PDS with a way to still own all of their data regardless of which of these applications they use) feels quite a bit more sane and sustainable than a plethora of projects re-implementing the full-stack wheel from scratch in ActivityPub, requiring similar server backend, similar storage infrastructure and similar federation functionality they then and now end up struggling to do right which keeps them from actually building good applications to cater to a certain group of users. A certain AP photo sharing platform with still a wagonload of unresolved issues in many rather basic functionality comes to mind. Makes me wonder, overally, whether ATProto is a better choice for building applications this way - or whether it's just a matter of community and how people choose to collaborate and do work together or in competition.