(I'm starting to become concerned with how frequently people from the WMF point out to newspapers and Q&A sites as their inspiration for the Flow design. Those sites are not designed at all to support a sustained conversation, so they're a terrible example to follow - their purpose is entirely different. Where are all the examples and comparisons with discussion forums such as phpBB, Discourse, the Slashdot beta -ok that one is not a good example-, etc?).