I could rave about c0da all day in depth and it really has two dimensions, a simple and a deep one.
The simple one is that Dwemer, basically being the Atheist archetype, thought that without love, only using logic they could make a God and create a more real better world. Their God was Numidium and it was never actually destroyed in the past. Its godly power was rejection of world laws so it was wreaking havoc outside of normal time and space. Once it landed back in Nirn, Nirn broke and everyone who survived relocated to the moons. This is known as Landfall.
To not be affected by causality, Numidium broke both time and space, sending Akatosh into mad frenzy. Nobody could've stop Numidium until one of the Nerevarines achieved CHIM and outargued Numidium. You see, when time and space broke, all player Nerevatines who survived into the far future became canon. One of them was taught by Vivec. Nerevarine who in the late 5th Era, when Numidium was about to destroy the whole Mundus, stopped it by defeating it in an argument. Dwemer were deniers, destroyers pretending they're going to create something better afterwards. He made them realize they were like a teenager throwing a temper tantrum against the world. Upon the realization of, Numidium anihilated its own self.
Following this, Nerevarine killed the male aspect of Vivec with all his flaws and took a fem. Vhek for his lover. Thus two CHIM users, one masculine and one feminine had a baby - a product of Love. Creation of something more from two who had known their personal limitations.
You see, the TES world is a dream inside a place unknown. Love is the main ingredient one needs to transcend out of the dream, over it. A person with CHIM is still trapped within. Instead of realizing they don't really exist and are a fiction, they find something to love, which keeps them alive, in face of all the absurdity. Vivec was a prostitute and Talos was a wargod - both loved their peoples and that love was strong enough keep them alive even when faced with kind of an enlightenment - that they don't exist. Yet, their love wasn't pure. Pure Love in, to aproximate it, in the Christian sense was attained, was manifested only in the creation of that baby, which touched the hearts of all in Tamriel and opened a way to new world pure hearted and repented men could forge for themselves out of this dream.
Well… Now that I've explained the simple explanation… Lets rather call them complex and very complex.
c0da happens among the dunmer, which is why there's very little other races. Some Redguards continued existing on the broken Nirn ffs. There's no grounding for a statement that X race is dead.
Further details would be that they c0da world is full of technology, as well as TES magic since it's the far future.
…. Call this autism, sure. But I still wanna defend myself on one point: I'm a trad Catholic and don't believe in this TES stuff. I was just into TES before I stopped tipping my fedora.
And while I never frequented TES forums on leddit, I can confirm they're cancerous. Details trickle down with time… And they're fedora tippers mostly trying to fill the gaping hole in their heart with fictional worlds since they're too scared to get into actual theology.