Using Reddit as an example of a good user interface is going to turn some people off. Arguably Reddit is an example of everything that goes wrong here. The interface is less informative and usable than it used to be so that it can get in people's faces with irrelevant updates and endless ads. And on top of that it tends to be slow and prone to going dead. Perhaps real time applications may in time through experience lead to real quiet and real politely well behaved applications?