re: Demand driven simulation, and "virtual" "reality"
What's apparent is that what we DO know is like the shadows on Plato's cave.
It's fascinating to realize that the observable universe is 90+ % dominated by 'dark' matter and a force that we know nothing about, that this universe is very, very strange down at the quantum level, the very level that our electronics and internet relies on, and that this 'universe' may be one smidgen in an infinite multiverse. Gotta frakin luv it!