All of this leads me back to John Cowper Powys, who, at the end of his life, wrote at least two novellas with apocalyptic storylines, the earth committing suicide in Up and Out, and the characters deciding to abandon the entire planet so that they can start a commune on the Asteroid Nubilium in Two and Two. The Titan Typhoeus visits the Asteroid Nubilium, and he and Wat Kums, who is the ruler of the commune, become such good friends that they fly away together into even deeper space until universal nature is changing around them.
But in any case and in whatever direction they were going, on and on they went, at a terrific pace, into absolute Nothingness, without Sun or Moon or Stars, without hope or fear; but at least aware that they were friends.
Both of these books are massively peopled. Life ends or life is dismissed but life keeps pouring in, multiple gods and demons arrive, Chinese philosophers ride up on turtles, the stars talk (“And then Aldebaran assumed control of the whole situation”), the newcomers bicker, they explain themselves, and they behave in ways that are humanly rather than godly. God and Satan hold a long discussion after the suicide of the earth and God decides that he will commit suicide too. His motivation is a human motivation. The decisions confronting him are confusing and the confusion has paralysed him. “I am at my wits' end.”
All of the characters eliminate themselves completely, following the example of God. “But who will hear my last words?” asks Gor the narrator. “Oh, I do so, so want somebody to hear them! I want someone, somewhere, to know how deeply I understood the best Greek and Latin poets! Yes! It's to you, somebody, somewhere, that I'm talking now!” […] There must be somebody there, there must, there must, there must, there must be somebody!” The reader knows that there is, because they're it. And then there is the room or lawn around them, a confirmation that the world did not end. In Two and Two the characters decide to leave their bodies and join infinity but it is made clear that this does not mean abandoning their personalities and there is no chance of their bodiless selves drifting into someone else's bodiless self and getting mixed up or combined or adulterated. Their separate consciousness will remain absolutely distinct. In fact their distinct selves are imperishable. “According to this view the self-hood of each of us, which includes in it the shape and attributes of our former body can never vanish away.”
“Gallant Mrs Smith” reiterates that last idea in You and Me.
Why shouldn't this something, Professor, this something in us that watches these outward things and considers the fate of these outward things, the something that has the inherent power to survive when all these outward things including the outside universe, have entirely vanished?”
Powys illustrates Colebrook's point and exacerbates it, the end of the earth (either by disintegration or abandonment) leading to fecundity and the end of the body leading to impenetrable personal boundaries. You do not go into the afterlife alone, and death is not a moment of isolation. You do not go into a silent void. You talk. There is no peace. There is no rest. There is only assertion.