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Is he talking about figurative or literal? In Bohr original quantum formulation, classical and quantum is the cut or boundary. In von Neumann approach.. it looks like it's all quantum.. that is.. he treats the classical as quantum too.. hence the cut or boundary can be located anywhere in the all quantum stuff?

It was proposed over 70 years ago. Now in light of decoherence. How does one interpret what von Neumann was saying? Is it part of Copenhagen? Is this the other variant compared to the original Bohr classical-quantum cut. How do you understand it? Can you give an actual setup or experiments to demonstrate this von Neumann chain and the collapse cut that can be move anywhere? Thanks.