Are people still working on improving the standards behind RSS/Atom? Or did that fizzle out with the rise of social media? For example one thing I've wondered

Are people still working on improving the standards behind RSS/Atom? Or did that fizzle out with the rise of social media? For example one thing I've wondered about are signed feed entries. At some point I'd like to be more certain about the author of the media I'm reading, while also being able to prove I've not modified anything. I guess I'm kind-of describing Signed Exchanges but less restrictive, maybe it could be done in conjunction with GPG?