I think the most interesting part is the difference between human extinction and other serious consequences of AI. A 5 to 10 percent chance of actual extinction sounds extremely high, but the article also makes it clear that things like misuse, concentration of power, destabilization and loss of human control could be much more likely. I also like that the author asked several different AI systems instead of relying on just one answer. The numbers should not be treated as scientific predictions, but the fact that the systems give such different estimates shows how uncertain this whole question still is.