this post was submitted on 26 Apr 2023
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It's not that simple. ActivityPub is at risk of centralization, just like email. There are no built-in protections against centralization or EEE (Embrace, Extend, Extinguish). Furthermore, Mastodon makes it difficult to migrate accounts, especially from an instance that is unreachable or just disabled the export function.
Unfortunately locking users into a platform is extremely valuable because they can be shown ads, used for data mining, manipulation (like Cambridge Analytica). ActivityPub is not automatically immune to all of this.
The comparison with IRC is not very meaningful: moving from one server to another is much easier because IRC users don't lose followers, bookmarks, posts, etc.
How would a "built-in protection against centralization" even work?
IMHO, you can only provide tools. You can't prevent people from being stupid and not using them. That's also why by now, e.g. the EU tries to solve such problems through regulation.
The protocol could require "dual-homing" user accounts, where each account is automatically replicated on 2 different instances without need for hacks and workarounds. That would prevent users from losing their account if an instance is shut down, and also make it easy to migrate to a new instance without losing followers etc. The clients following your account always check for updates on both instances and if you move one of your accounts they update automatically.
(This would not create significant additional load on the network: your toots are already being replicated on all instances where you have followers.)
No, tools are rarely "neutral". They encourage or discourage workflows and behaviors.
@federico3
Sounds like Nomadic identity from the Hubzilla and Streams projects.
The point is that IRC is normally used in a way that leaves more to the client. ActivityPub services usually expect that users put much more trust in the instances. It might be worth thinking about that.