Pi is still wrong. Every math person knows this, and yet thousands of years later, we're still using π/2 in calculations because a diameter doesn't really define a circle, the radius does. And pi throws off all the math/trig deal with the double conversion.
From conversations with really young people and/or their parents, there are now three kinds of math taught in elementary and high school, none of which resemble the "new math" I learned growing up. If they can change long division, why not ditch Pi for Tau? It's time to start adding a Tau key to calculators.
The Tau manifesto is kind of awesome.
However, this short video lays out the argument much more deliciously:
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