Top of my head? Apart from that, the other two big ones are the argument that the rate of progress is exponential in general, and AI's integration will further improve it. And Vinge's superhuman agents idea, which posits that we can't predict the results of AI R&D once it hits the point of being beyond human capabilities.

I tend to think that either of those is more likely (or rather, the first is inevitable and the second is hard to predict), and that we're in the runup to a soft takeoff now.