I find all of this stuff very interesting but nonetheless these two voices sound like they could never win an election and aspire not to. That is the ultimate test of the worthlessness of a policy - it's all equally worthless until it wins an election, and that's what makes it reality.
AI Doomerism versus Accelerationism are both playful fantasies, it doesn't really matter what measurements or probabilities or observations they make, because the substantive part is the policies they advocate for, and policies are meaningless - all equally worthless - until elected.
What am I saying? The best rebuttal is, get elected.
Iran's leadership seems to be a solid rebuttal of that argument.
The interesting thing is that, for the "Father of Accelerationism" (Nick Land), AI Doomerism (doom for humans, at least for human identity) and Accelerationism (which for Land is just another label for capitalism: 'The label "accelerationism" exists because "capitalismism" would be too awkward.'[0]) are not opposed at all. And capitalism does not need to get elected.
(Land follows the above quote with "(But the reflexivity of the latter [capitalismism] is implicit.)"[0], which specifies that, for Land, more precisely, "Accelerationism is simply the self-awareness of capitalism"[1].)
[0] Nick Land (2018). Outsideness: 2013-2023, Noumena Institute, p. 71.
[1] Nick Land (2017). A Quick-and-Dirty Introduction to Accelerationism in Jacobite Magazine. Retrieved from github.com/cyborg-nomade/reignition