when #ActivityPub was being standardized alongside AS2 it basically had two compelling reasons for what would become the #fediverse to adopt it:
- it was built on AS2, which was an evolution of AS1, which was already being used. so it wasn't hard to make the jump.
- it made followers-only posts possible, because while atom feeds *could* do this, it was wildly inconvenient to actually do it that way. posting something private to an inbox is a lot simpler, no juggling access control tokens.
6/?