Built-in economics (subscriptions, tipping) is awesome but I think the platform agnostic stuff is really interesting...
Today if you wanted to have your own blog front-end, you have to couple that with figuring out your own distribution and giving up the audience of major platform (medium, substack). Love the idea of a future where the content, comments, likes, followers, etc. preserved across platforms. I could publish today anywhere, and know that I could build my own frontend in the future without starting from scratch. very cool