That OpenAI timeline thing that just launched is more better approach, it solves content problem by just gathering data in background and feeding it to the user anyway. That particular implementation might not work but it sounds correct.
IMO, not much of value of Twitter for most users is in ability to post tweets, it's in data bandwidth. 99.9% of users don't post anything interesting, those might as well be local text file or oit of band shared filler content. The value is in content sourcing, so something like multi-social RSS reader with optional P2P should be the way to go. Just IMdimO, though...