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I don't know that I agree with what I see as the implications of the question - the economics of liquid helium is not even close to the whole story - but think about it for a minute. The claim is that the search for liquid nitrogen superconductors has been driven by the high cost of liquid helium. Suppose now that the cost of liquid helium drops - what happens then?
Put it in different terms - I own one Prada bag, largely because I can't justify the expense of more. I own quite a few from other, less expensive designers. What do you suppose I'd do if the cost of Prada dropped suddenly while the quality remained the same?
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