When a conference is cloned it would be nice if it were possible to keep the registration tags that are defined for the event. This would be useful since some local organisers here use these across many events and would like to keep it consistent between them (essentially using a master "event" as a template).

So this would be during event cloning, where event registration is selected to add an option to also carry those over. I see from the implementation that the registration tags are associated to each event so I guess there would need to be a part where these are cloned. If it is something interesting and not 100% trivial I can try to contribute it.