I'm going to go out on a limb and suggest that this is a matter of evolution, that humans are in no way exceptional in the grand scheme, and that AGI will manifest so long as technology advances, because human consciousness is simply a matter of complexity of the system.
The idea comes out of emergent complexity in Conway's Game of Life. In Conway's words:
"There are Life patterns which behave like self-replicating animals… It’s probable, given a large enough Life space, initially in a random state, that after a long time, intelligent self-replicating animals will emerge and populate some parts of the space.”
Source: Winning Ways for Your Mathematical Plays
I came across a paper Computation in Cellular Automata:
A Selected Review, which I am still working my way through, and which you may find interesting.
For those who use philosophical arguments to make the case algorithmic consciousness is not possible, I'd posit the question "how do we know we're conscious?", not because I'm interested in the answer, but merely to throw a wrench into that line of inquiry.
Because ultimately it doesn't matter.
Consciousness in the sense of human awareness is not a requirement of life, and the most basic definition of consciousness is awareness of any kind, no matter how trivial.
I find the idea that there is something "magical" about human consciousness, that ideas are not things because they do not have material form, to be problematic.
Intangibility I don't have a problem with, as intangibles clearly interact with the physical world.
(As an analogy, I studied for many years with a famous Tai Chi teacher who never talked about "chi". I suspect this disinclination derived from the way in which the concept of "chi" leads to magical thinking, which is illusory as opposed to practical. The practice and application of Tai Chi techniques is purely a matter of physics and physiology, even when such applications seem to defy natural laws. Possibly there is something going on that we don't understand, but if that were the case, such phenomena are natural in origin.)
We know there is randomness in nature at the quantum level, and if this proves to be a component of human consciousness, we can use quantum computing to provide a medium for artificial consciousness.