From the Ghost blog via @manton:

"One of the things we’re learning as we go is that ActivityPub is resource-intensive, and can be pretty expensive/difficult to run robustly."

A hard requirement for Smolblog is being able to run efficiently on cheap/shared hosts. Native AP is secondary to that… 😅
 https://activitypub.ghost.org/beta-plans/ https://micro.blog/manton