I dont think multi-conversational branches per thread type forum/messageboard setups caught on that much, even though that sort of thing became the norm on various popular websites commenting & social systems. I’m sure there are various reasons why, perhaps including such features not being done right by the popular web forum systems. Perhaps other reasons such as it being one level too many, given the existing sub-forum and thread based levels of granularity. Perhaps they create as many problems as they solve. I’m not looking for epic to be cutting edge on every single front.