Okay, so #Matrix: positives are that the #Riot client has a beauteous interface; http://status.hackerposse.com/url/13727's bridge to #Freenode offers ever-growing scrollback in #IRC rooms; possible to !selfhost a matrix server. Minuses: I haven't yet found a http://status.hackerposse.com/url/13728 bridge to #XMPP (which would greatly enhance its value to me); no concept of indi…