ActivityPub hot take. https://beesbuzz.biz/blog/2535-ActivityPub-hot-take
I don't have a deep understanding of much of it, but the general gist seems to be that RSS/Atom can do plenty of what ActivityPub can do, with its own benefits and easier implementation.
I couldn't argue either way, but interesting to read. I'm happy there's a plurality of approaches to this decentralisation movement, that's a healthy sign.