Personally I love the idea of a local replica along with server-side data (maybe end-to-end encrypted). It hasn't be implemented in Windi because it needs some design to play well with sharing features (inter-user bidirectional links, global tags, etc.) but this is definitely on the roadmap! Specifically:

- real-time log replication (that allows to maintain a local database consistent with the server state)

- end-to-end encryption