I have a question: how good will pubsub scale? For example, if I'm subscribing to, let's say, 10k topics, and there are 25k nodes sending updates to these topics... Will I receive them all?

Also: will I receive pubs on topics which were published before I, as a node, got online?

What about netsplit? If someone in the network which isn't connected to me pubs an update to a topic, will I receive the pub?

(All that in the context of receiving comments on a post, where both the post and the comment are an IPFS entry.... ; The problem is that somehow the post must receive a "you just got a comment on this" and others who look at the post might eant to see the comment as well... But we cannot change the post, of course,... I am still thinking about the social network stuff in IPFS, you know...)