I mean, besides the fact that the storyline team wanted them to make way for the Dark Eldar… Necrons… Second Empire Jove?
From what I remember from the old lore, Jove were essentially clones / grown artificially (old art depicts “Fetus-tubes, the Jovian way of reproduction for many millennia.”) and daddy and mommy Jove didn’t need to love each other very much to make a new one. They could make as much as they like. There is, of course the Jovian disease which supposedly kept them unable to reinforce their numbers, but onset of the Jovian Disease apparently can be extremely late in their lives.
Looking at the Inheritance -chronicle, parts of it mentions Ouria. EVE lore buffs and very, very, very ancient players might remember this Ouria from succumbing to the Jovian Disease in late 2003 and losing a couple of Eidolons (with his buddies) in the Stain region. It is explicitly stated that this is the same Ouria, not just some guy with the same name.
So, by that time he was probably around 400 years old.
The Inheritance -chronicle mentions him in a setting of “250 BYC”, Before Yoiul Conference, soon to be 120 years ago, so rounding up that was 370 years back. “A young but brilliant explorer” back then - I am assuming they didn’t assign him to be an expedition commander before he was at least in his 30’s or more - though who knows what such a long lived subspecies considers “young.”
Further, Veniel, the main Jove character in this chronicle is almost as old as Ouria was - so that makes him too anywhere about 350-400 years old, and he doesn’t appear to have succumbed to the Jovian Disease yet, though perhaps he sensed it approaching which prompted him to enable the “legacy protocol.”
Surely it is possible that Ouria and Veniel were of those lucky few who didn’t fall to “their curse” at an earlier stage in their lives. But lets assume they were not.
So, my question is this; How does a species that is this long lived, doesn’t reproduce sexually anymore but by Xerox machine, and appear to fall to suicidal tendencies only as centuries old, die out in a span of a few decades? Only explanation to this that comes to mind would be that they voluntarily went extinct. They stopped producing any new Jove hundreds of years ago for reasons only they know.
Additionally, Jovian Disease is said to be genetic. Jove, like any other intelligent species in the setting were still human. How come they could not cure this disease by studying healthy human genes all around the cluster? Some masters of genetic engineering they were. IIRC a tinfoil hat theory was that the pod technology was a conspiracy for the Jove to obtain samples of the “very best” as in most of the lore surrounding the older generations of capsuleers requires them to be the pinnacle of humanity in fitness, genetic health and intelligence.
So, yeah, there’s a few things to get the thread rolling.