Who Cares About Girdle's Theorem?

Jason hale says if you could talk boer einstein heisenberg, what would be the biggest advance that would inform their thinking on quanta mechanics since their time? i think the answer is pretty obviously, a better understanding of decoherence. I mean, maybe there were some hints in heisenberg and schrurdenger that that they knew something about it, but there clearly was not a systematic understanding. The whole copenhagen philosophy of boer and heisen burg largely shut off investigations into it.