Thanks for the clarification — that makes sense.
For cross-instance activity backup: understood that without admin access there are no plans for automated mirroring. The /my/preferences/account export suggestion is helpful. Do you know if there’s any documented or stable format/API intended for programmatically consuming that user export (or a recommended migration path) so a user can import their own content into another Discourse instance?
Re ActivityPub: agreed it’s more of a site-level feature today. If there’s ever interest, a “user-centric” mode (sync only my public authored posts, with canonical links/attribution) would be exactly what I’m looking for.
For the unified multi-site experience: I’ll check out Discourse Hub — the notification + “hot topics” overview already sounds useful. If there’s a place to track ideas, I’d be happy to file a feature request specifically for a richer read-only aggregated feed (across sites I’m signed into), while keeping interaction on the original site as you described.
Thanks again!