But Sollux, even with his vision twofold, does not have the perceptional luxuries of our vision omnipresent.
When executed, the subprogram will summon an indestructible demon into the recently voided universe. This monstrous being with the power to travel through time is inconvenienced very little by his arrival upon THE GREAT UNDOING. He has the entire cadaver of the expired universe to pick apart at his whim. From its birth through its swelling maturity and tapering decay. In a reality he is known to have marked for predation, he will go about assembling followers through various epochs, even going as far as personally establishing the parameters for his future summoning.
Sollux couldn't know that the virus is essentially a formality.
The demon is already here.