We're granted some reprieve here; this isn't happening in a matter of days or weeks, like so much of what's going on in the LLM world.

Reality is the highest-resolution system we know of, and the ultimate source of truth. But there's an awful lot of it, and it's also painfully slow to work with; unlike in simulation, reality demands that you operate at a painfully slow one minute per minute, and you're only allowed to use as many bodies as you've actually built.