He is being much less allegorical than you assume. If you are as willing as he is to more or less ignore claims to psychism being a precious absolute reserved for "higher beings", i.e, carbon based lifeforms, then you can admit just about any machine or collection of machines becoming self-aware with just enough automation going on.
He does away with the notion that we are protagonists in the emergent effect of the capital. Emergence is defined as a collective effect that does not depend on the particular properties of each composing unit in a system, i.e, if capitalism is an emergent effect of humans being around, it does not depend on any particular humans. It does, however, depend on humans being there in large numbers for the effect to appear, much like consciousness apparently depends on a brain.
His claim can be simplified then to mean (though I'm not sure he would agree with this himself): just like we can potentially upload our consciousness into some other platform, becoming a new state, that does not depend on our brains to thrive, so can, and will, capitalism transfer itself to a new system once our capacity of expanding it has grinded to a halt.
In this way, time compression and the direction we are going become crystal clear to everyone: the capital, not us, is heading as fast as it can towards its version 2.0, and we don't really know if that version will have humanity included in the package at all.
The only way to fathom just how fast things are speeding up is to partake in actual research or actually be close to someone who does. The internet is old and it took dozens of years for it to be established as a common trope in our lives, whereas newer applications go from research to production in a matter of months. It IS a feature of accelerationism that things are incrementally updated rather than built from the ground. Where do you even draw the line between a new invention and an incremental one anyway?
I also have no idea what "the technology explosion of 100 years ago has not been matched since". I think you are conflating accelerated technological development with abundance of basic and fundamental, theoretical research. 100 years ago we were coming up with quantum mechanics and general relativity was nearly fully laid out. However it took many years for quantum mechanics to develop into computers, let alone develop into quantum computers. And now quantum computers are in pre-sale before even going out of the lab, because capitalists are that much sure of how fast they are able to develop theory incrementally into something workable. I cannot stress this enough, there was no such explosion like we have now, what we can claim, and it's a very valid claim, was that all the groundwork (quantum mechanics) which did NOT become applied immediately at that time, was done 100 years ago.