Robin Z: The motivation for suspecting that something funny happens as you try scale up decoherance to full blown many-worlds comes from the serious problems that many-worlds has. Beyond the issue with predicting the Born postulate, there are serious conceptual problems with defining individual worlds, even emergently.
Enough said—I withdraw my implied objection. I, too, hope the experiment you refer to will provide new insight.
Is there any reason to believe that something interferes with the physics between “microscopic decoherence” and “macroscopic decoherence” that affects the latter and not the former? I’m just saying because I’m getting strong echoes of the “microevolution vs. macroevolution” misconception—in both cases, people seem to be rejecting the obvious extension of a hypothesis to the human level.