AI will kill us by turning us on each other. It has already been doing it for some time.
while i dont think our species will be wiped out because of it, it's a mistake to not recognize the difference in efficacy and scale that ai enables.
And then there's a slight possibility of 'terminator skynet' style trouble, Where the AI starts to make the decisions to benefit itself. But I guess the chances of an AI screwing up their own supply chain would be near 100% so I'm not too afraid of that.