also predating the empyrean age, and still in the mission pool, are the missions that are all "tensions between X and Y factions are high, and there is a possibility that war may break out".
X and Y being say Caldari and Gallente. They've been at war for 6 years, and those missions have never been edited or pulled.
pve content consistency is hard. Missions don't get updated.
Not least because, apparently, according to some devposts and devquotes, until very, very recently, mission deadspace complexes were constructed by hand, one at a time, using devspawning tools, in a version of the client, using the POS structure placement code.