Using such a DA from big Tech has the potential to become the ultimate tool of control: you don't just manipulate the narratives in public but you can create a personalized "reality" for every user.

However, I am looking forward building something like this in a sovereign tech stack on my own hardware, under my control. An ultimate ad blocker for online and offline. A bullshit filter, that helps me manage information overload and all the informational noise. An alarm when someone hostile approaches. You get the idea. Cool stuff!

The question is: who controls the stack? Which master does the AI listen to?

It all comes down the seizing the means of computation.