rss had two major hurdles that made it difficult for people to pick up.<p>1) there was no collaborative space for teams to work together to create feed mixes.  No service I know of became popular that allowed team of 7 people to moderate the member feeds of a metafeed.  This harmed discovery.<p>2) Deduplication was usually a human task.  Techmeme really spoiled me. It was impossible to see what other people had already marked as duplicate &quot;aggregations&quot; of an original story.<p>these two together basically meant that EVERY person who used rss reinvented the wheel.  You couldnt latch on to other peoples work like you can subscribe to a subreddit.  Twitter has a similar problem, it lacks collaboratively maintained lists.  It kind of blows my mind how neglected the idea of a &quot;run your own slashdot&#x2F;techmeme with friends&quot; is.<p>i probably sound like a shill by now, but redef.com seems to be moving in the right direction.