If you're interested in furthering RSS (and Atom, JSON Feed) - one way to help this along is to continue extending it to bring it modern. For instance, I've documented an extension for adding temporary 'status' to the feed - useful for pinned posts or broadcasting that a livestream is beginning.
https://github.com/kickscondor/fraidycat/wiki/RSS-Atom-Exten...
It feels like there is still a lot of room to extend these formats - part of the advantage to them is how easily they can be extended. The media enclosure extension is the reason they've been so useful for podcast subscriptions.