When I see articles like this, my reaction is always: when did RSS go away? I have close to 200 sites in my Feedly list, and I have trouble keeping up with all the articles I get from RSS every day. I think that what the author really means is that he misses RSS feeds from Twitter. I don't use Twitter, so from my perspective, RSS is as present and useful as it was 20 years ago.
Precisley, that's how I got to this post. In this day, keeping a list of interesting sites and being able to consult them all from a single place is ever more useful.