Like Louis Reed often complains about; it is mostly "old stuff". Not that that makes it any less compelling, but even I would have to agree that more emphasis on recent times would be more motivating. Hopefully that omission is not due to a lack of anything worthy to report on?
Alas, that is the situation. Little has been published because there are only a few researchers left in the field, and they are elderly and unproductive. The others are retired or dead.