So what is the actual design? How is it different from SMTP or other comparable protocols or products? The page tells me it's meant to replace email, it binds together features like charts into this smtp replacement (don't quite get why one needs to have anything to do with the other), and then tells me where I can download it. The only link to a design spec goes to a Github repo with 1 issue namely "todo: design docs".

What's here to see if not that? I'm not going to spend hours on installing, running and testing software when I don't even conceptually know how it works. It's like linking a download page for yet another instant messenger, saying it'll have certain high level features, but not how the design will be better than the existing messaging services. Why should I install that?

I'd love to read about a concrete design that could fix (some of) email/smtp's problems and get invested in the idea and run a server of my own etc., in that order, but not spend hours investigating something with a 95% chance of not being better in the first place.