Gregory's Server@thegibson From what I see, the gain is structured communication. You can't "like" people's emails and have everyone see you've liked it, you can't differentiate between a Note or a Page (among other things), and lastly, email today is heavily locked down by the big companies, blacklisting people using VPS for mail servers.
If email had the same structure, there would've been no reason for ActivityPub. ActivityPub is extensible by design.
@thegibson Imagine not needing a blog anymore. Instead you write up your Page object, and post it to your /outbox/. Now forever, anyone can look at what you've written, comment on it, share it, like it, etc.
How can email do this as effectively?