Quote Originally Posted by MikkoAkure View Post
Considering they are stored in a server as memories when not in use and then manifested when called in using someone else's soul, I think it's inferred that they don't have souls of their own. They don't exist in Living Memory into perpetuity when they get downloaded into the cloud because one Endless says that only 1 in 10 exist at the same time and he's gone back and forth between the terminals and Living Memory 3 times. Getting "slain" by fiends also just means getting resent to the terminals rather than a cessation of existence. Even Ancients, dragons, and Omicrons can be slain. Then there's also the matter of the Endless at Deadwalk who got separated from their aether supply and turned into monsters. Not sure if that's soul aether they needed to continue to exist or sucking up mundane aether like Zero did from an apple.

Dragons are an alien lifeform from a completely separate star. They also don't live until they're bored. The Greatwyrms may have infinitely long lives but that does not extend to their brood and a large chunk of a whole zone is devoted to the dragon graveyard and the lore book itself says they can die of old age. They sense when their time is coming, show up at the graveyard, and die of old age or of their wounds. But just as you yourself stated, they as a race have the capability to birth new generations which is something the Endless are incapable of.
Well, that’s the problem with cherry picking arguments like that, it goes both ways.
They can’t give birth? Well, can Omicrons? Is procreation now a definition of life, not soul then?
They can’t leave the Living Memory area? Scions were dying in the First. People on life support can’t be without it. We can’t survive in space as is, and so on.

The reality in my opinion is simply that it was an artificially created problem with shoehorned solution which contradicted to the already established stories. But if you are sincerely convinced by the writing as you seem - then you are lucked out.