Love the broad direction, and I'm interested in digging into this area myself (decentralized social networks and applications). Recently been studying Lens Protocol a bit (https://lens.xyz/) which has a social graph system that records to the blockchain (Polygon in this case). Check that out and let me know what you think of it.
I like the idea of hosting logseq graphs on IPFS. It does seem that with other decentralized networks I've looked at, that scaling up to Facebook level would not be practical as the size of the graph grows. It almost seems like you have to sacrifice decentralization for a centralized database. Do you think logseq would perform on that scale or would it be limited to niche social networks?
Either way, signed up for the newsletter, looking forward to following your progress on this! And always down for a chat with an old friend!