Yes. I started working on this Friday evening and then decided to postpone the feature. I think that persistence needs careful design and thought: we of course don't want to deanonymize people by patterns they accidentally create.

There are some nasty data elements in the protocol, like a geolocation pair and usernames/hashes that may turn a statistics app into a surveillance tool - I'm not sure if the protocol and its users are ready to defend against that, yet. When we do, it would be good to also have a recommendation to help people counter a passive observer - this needs some preparation and study of what defenses are in place.