Today the #HolosSocial project takes a step forward by letting one account run on several devices.
It may sound minor, but each device runs its own #ActivityPub server, which made it a real challenge: avoiding duplicate actions sent to other instances and keeping everything in sync.
All of this stays transparent for the user: adding a device is as simple as scanning a QR code, and the whole transfer is end to end encrypted between the two devices, so the relay never sees it in clear.