What are some other technologies like afterburners that boost performance at the expense of efficiency?
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if you were losing efficiency everywhere then it wouldnt be useful. You lose energy efficiency w/r to distance but gain local time.
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.@iddqkfa I'd argue energy efficiency is fundamental in a way time and other sorts of efficiency aren't, due to entropy/2nd law factors
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space-time is pretty fundamental also, but then time and energy are really connected, in physics and economics.

