I possibly would fear genuine non-human intelligence (on a principle of fearing what we don't understand), but given that chances of one evolving under our nose, on its own, entirely within its own world, without the connection for ours, then emerging, are quite improbable... Unless real aliens arrive - but let's avoid spoilers for 2025 this early.
What should I fear, I think, is hostile intelligence, but then I'm not sure I should discriminate on its origin. I mean, there are some very real humans out there who can try to end this world (in one way or another), so I'm probably kind of desensitized and isn't exactly afraid of some very theoretical AGI threats.
What I wanted to say is that, I, in particular, really don’t care if it is a human trying to harm me, or a machine. Both of those scenarios are so unfavorable, I really don’t see a point in having any preference. So, I guess, I can’t think of any evil human to replace with even just an evil robot either.
But I think I’m less imaginative of a machine becoming sentient and hostile, than a human doing so. The former hadn’t happened - and isn’t exactly trivial, given how big this fear is a part of human culture, and how slow and limited first AGI is inevitably going to be. And then we have an abundance of the latter.
I mean I don't want to die before my time so to speak, but I'd say at some stage I'll have enough.
I'd say the best outcome would be having excellent medicine to ensure something like a relatively fit body for 1-200 years and then see how that goes first. Living forever, not having any kind of conclusion? Seems like a careful what you wish for.
But AI doomsayers aren't saying that there's no possible good outcomes, they're saying that the good outcomes are a narrow target surrounded by a vast ocean of bad outcomes, and it will take more than luck to hit them. It will take careful, detailed analysis, and a great deal of precaution, verification, engineering, and double- and triple-checking. Not luck. Not hope.