

Client side is completely out of the question here. You can’t just send millions of posts to every client hoping that they will order it themselves. Bluesky has a well thought out architecture that does that through server side feed gens, that can be decoupled from the App itself.
https://docs.bsky.app/docs/advanced-guides/federation-architecture
Thankfully, I am not at that point of desperation to consider Atlassian a valid alternative.