Exactly, robot already means slave so it means "mechanical slave's slave". So in my grand vision for the future, even the mechanical slaves get their own slaves!
Holy shit, I hope this is sarcasm because if not you're delusional dude
What you have against "machine learning"? FYI I'm not a stalinist.
Just so you know, your instance is run by proud bolsheviks, not AI-researchers...
What I personally envision is...
Okay, that's fine in fiction as long as you don't care about sounding convincing, but in reality providing food, water, utilities, and living space to that many people is a bit more complex than that.
And except using fusion power to create protein or something like rice and wheat grain analogues directly in bioreactors,
That's not what fusion is. Nuclear fusion is only necessary for changing atoms into different elements. Bioreactors and protein synthesis are chemical reactions, not nuclear. They only change on the molecular level.
it will never be efficient to do vertical farming.
It might be less energy efficient, but if you have infinite solar generation that won't matter. Vertical warehouse farming is more efficient in terms of space, water consumption, fertilizer, and most every other externality such as pesticides, harvesting, etc.. It can even be hydroponic or aeroponic, using self-contained and circular systems, and almost every step can be automated.
Converting sunlight into electricity to power grow lights is never more efficient than greenhouses tended to by farmbots.
That won't be the main issue if you have infinite solar power, and farmbots can still be used in vertical warehouse farming. Single-layer greenhouses take up a lot of space though, especially if you need to produce enough to feed several billion people.