But in analogous equations (energy of motion .5mv^2, energy of spring, .5kx^2), there is a 1/2. Basically, anytime you integrate a linear equation, you get a factor of 1/2. Using pi as the circle constant hides this fact.
Instead of celebrating tau, we should be celebrating integers. Robust, fast, compact, reliable, easy to understand. With pi I can use more integers. Thank you pi!