> why federated, not decentralized? afaict, Matrix is both, kind of. Rooms are decentralized, while users are federated. > What about signal? Signal is great

> why federated, not decentralized? afaict, Matrix is both, kind of. Rooms are decentralized, while users are federated. > What about signal? Signal is great, but it solves a very different problem. It's a good replacement for talking to your best friends on your phone. But it fails quickly once you go past that. No true multi-device, no talking without releasing your phone number, no public groups. No mentions, no permalinks. In that regard, I'd say matrix is closer to telegram and irc than WhatsApp or Signal > what about metadata? The state of metadata in E2E is... not good. Really, only the content of the message is secret. There are a number of ideas how to deal with this.