I love RSS, but I've noticed that every time I explain the concept to a non-technical person and how they would go about adding feeds and setting up a feed reader it's perceived as a complicated non-starter. I could attribute that to my own failure to explain it, but normally I'm pretty good at making technical things simple for laymen so idk.

Obviously there's something wrong with RSS because it's a good idea that's been around a long time and it doesn't appear to be popular with the general public.