A "Top highlight" from an arbitrarily selected post  on Medium.   These top highlights can function as a crowdsourced "tl;dr" -- although not every post enables them.     Highlights can also be discussed in comments following the post.   Incidentally, here maybe the medium is the message -- one  person's highlight becomes a possible occasion for further discussion.   And yet, the way comments work on Medium, there is no such thing as a discussion thread!  So there is only a collection of perspectives on the piece -- a sort of "functorial" utopia.   (There are discussions on Medium, but they're just not very typical or obvious.)