This is not a joke any more than the dvorak keyboard layout is a joke or the metric system is a joke. It's an objectively better approach whose only drawback is the overwhelming force of tradition.
You cannot compare use of the metric system to use of Dvorak or tau=2pi. While Dvorak and tau may be objectively better, the real world gains to be had by switching to either are slim in reality. I already type upwards of 90 words a minute on Qwerty and I doubt that switching to Dvorak would yield much of a gain to my typing. The problem behind pi is that it is never explained correctly, and this can be worked around by fixing pedagogy without having to introduce yet another physical constant. If the United States switched to the metric system, however, doing business with foreign economies would immediately become easier and we would no longer have to memorize long tables of arbitrary conversion factors. It makes much more sense objectively AND pragmatically to use units that are derived from physical quantities, rather than legends about kings' feet and so forth. With the other two examples, the pragmatic improvement isn't there -- the improvements in quality of life/quality of thought that we would experience simply aren't worth the trouble of switching.
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This is not a joke any more than the dvorak keyboard layout is a joke or the metric system is a joke. It's an objectively better approach whose only drawback is the overwhelming force of tradition.
You cannot compare use of the metric system to use of Dvorak or tau=2pi. While Dvorak and tau may be objectively better, the real world gains to be had by switching to either are slim in reality. I already type upwards of 90 words a minute on Qwerty and I doubt that switching to Dvorak would yield much of a gain to my typing. The problem behind pi is that it is never explained correctly, and this can be worked around by fixing pedagogy without having to introduce yet another physical constant. If the United States switched to the metric system, however, doing business with foreign economies would immediately become easier and we would no longer have to memorize long tables of arbitrary conversion factors. It makes much more sense objectively AND pragmatically to use units that are derived from physical quantities, rather than legends about kings' feet and so forth. With the other two examples, the pragmatic improvement isn't there -- the improvements in quality of life/quality of thought that we would experience simply aren't worth the trouble of switching.