What we really need in the #SocialWeb, as the next iterative progression of #ActivityPub and its implementations like #Mastodon etc. IMHO. 
to store all posts and pictures etc *per user*, not per instance or account. This would radically reduce the scope of an implementation and allow for frictionless migration between instances. This does NOT necessarily need any change to the standard. It's an implementation detail, AFAICS. #SocialCG
Solid Project
Solid: Your data, your choice - Solid Project
Solid is an evolution of the web by its creator Sir Tim Berners-Lee. Solid realizes Tim