Thanks for your answer, I think on the same line as you, but I was here with a colleague that believes it's soon possible so we wanted to check what the community feels like it's gonna happen
Its just lots of that stuff from the waitbutwhy article really rankles me: e.g. having an x-axis for "human advancement" and then only valuing recent developments while under valuing things like writing or the printing press or treating intelligence as an integer value where an AGI can keep multiplying its intelligence and become completely unassailable by humans. There's a lot of bollocks intertwined with people that hope for AGI and it upsets me. I feel like it devalues and undermines the current progress that is being made.
My own view is that it's highly likely that we'll have something like AGI - but we might also find that it's not actually that useful, or really necessary, and anyway I suspect it will take a long time to get there (I'd guess 100-200 years).
I'm particularly fond of the Back to the Future example of how rapidly and unpredictably technological progress was accelerating, which completely ignored the fact that Back to the Future had a sequel whose tongue-in-cheek version of 2015 based entirely on 1980s culture is pretty much dead on, bar the hovering/flying stuff we haven't got around to inventing yet.
In other words, he's lying with a graph in order to try to make his argument have more emotional impact. And I have a policy of taking lying as a serious disqualification of people who are trying to persuade me...