WOW it's strange to see my fave rabbit holes on here lol. And props for linking Lexicanum instead of the Wiki That Shall Not Be Named!
Three very quick thoughts:
1. The Votann are remnants of humanity from the time when our Terran super-AIs ('Men of Gold') had built advanced ship-based AIs ('Men of Stone') to enable long-sleep-style interstellar colonization, and the enigmatic "Votann Cores" that guide them(/are them) are strongly hinted to be those same AIs, just degraded over ~19,000 years. They were sidelined later on, after humans discovered FTL through an alternate dimension, 'the immaterium'.
2. The story is very obviously based on Dune, and like everything else in 40k is turned up to 11 and stripped of nuance for effect. Some sentient robots ('Men of Iron') "revolted" after ~three millenia of brutal, Star Wars-style slavery, but the overarching "Age of Strife" was about human wars in an non-unified galaxy, with the robots being a primary weapon; the actual revolt/jihad was a symptom, just like it was in Dune.
3. The 'Adeptus Mechanicus' mentioned above are a parody of cargo cults (religions that worship technology they don't understand) mixed with a dystopian take on the themes of A Canticle for Lebowitz, and are very much depicted with derision. Whatever your thoughts are on AI, dear reader, please never say "abominable intelligence" like it's wisdom rather than the fruit of a dogmatic & ineffective cult!
Of course, 40k lore is notoriously amorphous; some authors have said/hinted otherwise. But I think the above interpretation is the most coherent and interesting and supported overall, IMHO. For example, #2 is supported by the fact that the space elves ('Aeldari'/Eldar) ruled the galaxy at the time and seemed unconcerned by humanity's antics, which wouldn't make sense in light of an actual ASI threat proper.
All cards on the table: I don't dive too deep into the black library stuff (who the fuck has time for 15 separate 890 page novels about the horus heresy -- them shits was like 3 pages in 2nd edition Codex Imperialis) so most of my attachment to the hobby is through the wargame codices, the video games and visual media. That said, I may have fallen asleep a night or 20 to Leutin's lovely voice and obsession with the lore. to respond to your comments:
> 1. The Votann are remnants of humanity from the time when our Terran super-AIs ('Men of Gold') had built advanced ship-based AIs ('Men of Stone') to enable long-sleep-style interstellar colonization, and the enigmatic "Votann Cores" that guide them(/are them) are strongly hinted to be those same AIs, just degraded over ~19,000 years. They were sidelined later on, after humans discovered FTL through an alternate dimension, 'the immaterium'.
For me, I really love the fact that they introduced a xenos faction descendant of man.
> 2. The story is very obviously based on Dune, and like everything else in 40k is turned up to 11 and stripped of nuance for effect. Some sentient robots ('Men of Iron') "revolted" after ~three millenia of brutal, Star Wars-style slavery, but the overarching "Age of Strife" was about human wars in an non-unified galaxy, with the robots being a primary weapon; the actual revolt/jihad was a symptom, just like it was in Dune.
It's important to highlight the age of strife was brought on in part by the birth of Slaanesh and the resulting warp storms breaking down system to system connections. It weren't just our dabblings in AI.
> 3. The 'Adeptus Mechanicus' mentioned above are a parody of cargo cults (religions that worship technology they don't understand) mixed with a dystopian take on the themes of A Canticle for Lebowitz, and are very much depicted with derision. Whatever your thoughts are on AI, dear reader, please never say "abominable intelligence" like it's wisdom rather than the fruit of a dogmatic & ineffective cult!
I've never been exposed to A Canticle for Lebowitz; thank you so much for the comment.