I think of https://wiki.c2.com/ https://wiki.c2.com/ where pages are organized like a graph, but within a page you might see a thread of paragraphs from people

I think of https://wiki.c2.com/ https://wiki.c2.com/ where pages are organized like a graph, but within a page you might see a thread of paragraphs from people replying to each other. That's an interesting mashup of the two ideas.