That is the thing... RSS is a remnant of a technology that was incredibly valuable in the early days of the internet. Years before we had Twitter, Facebook or Apple News there was only RSS. It was the de facto way of aggregating information from multiple sources across Blogs that were built on different web technologies. Now that sourcing and aggregation is baked into social platforms and is fed directly to us.
The reason I am still sticking with it is the self-curation of the sources of the articles and a clear goal of completion. With social feeds there is no way to tell how many stories there are to read through until I stumble upon something I've read before. In contrast, the RSS for me is like a newspaper. I can see how thick that "newspaper" is, I can skip sections and once everything is read, I discard it or save the stories I'm interested to read later.