Looked into anarc blog. What there wss said about Matrix can be said about SMTP and probably XMPP. To do GDPR you need to know every server you have sent message to. And compared to IRC defaults(forward and remove) anything will look like GDPR nightmare. GDPR was not designed for federated(like matrix and activitypub) communications and especially wasn’t designed for peer-to-peer communications.
Looked into anarc blog. What there wss said about Matrix can be said about SMTP and probably XMPP. To do GDPR you need to know every server you have sent message to. And compared to IRC defaults(forward and remove) anything will look like GDPR nightmare. GDPR was not designed for federated(like matrix and activitypub) communications and especially wasn’t designed for peer-to-peer communications.