The sad truth is that RSS is a product designed for an internet that doesn't really exist anymore (blogosphere on top of the open web). The reason everyone is dropping support for RSS is because not enough people are using it.
Besides the consumers not using it anymore you also see producers moving behind paywalls or pushing people to their website so they can click ads (media), and everyone else uses a few closed platforms (twitter, facebook).
EDIT: I personally would choose an RSS feed over Facebook's newsfeed any day of the week. Including having to go through the hassle of keeping my subscriptions up to date and going out of my way to find new sources. Unfortunately the reality is that mass consumers don't agree and FB has over 2 billion users whereas RSS readers are dropping left and right because no one is using them.
Every site I've cared to "subscribe" to has an RSS feed somewhere, so that end of things is still alive and well. I don't see any reason for them to stop either, I still end up at their site (assuming they only publish links) and that's all they can hope for.
Filters (never see topics or even entire sites, you don't want to); mark-as-read (never rescan, HUGE time saver); single place to monitor multiple sources; standard. All these things make RSS far superior to any subscribe/follow systems I've seen anywhere else. I know RSS was supposed to be about the content too, but just as a notification system, it's crushes anything else out there. Some sites still include the content, but obviously you can't get that from aggregate and multimedia sites. RSS still provides a better way to consume the general web, even if most people don't realize it. Thank you for your work.