I get what you're saying, but you can say the exact same thing using tau and it's simpler: Tau is a simple, straight line, and stretches the entire length of a

I get what you're saying, but you can say the exact same thing using tau and it's simpler: Tau is a simple, straight line, and stretches the entire length of a circle, starting from the x-axis in the positive x direction, and ending at the x-axis from the negative x direction. So Tau / 2 is the amount of turning needed to go half-way around the circle. Tau / 4 is the amount of turning needed to go a forth of the way around the circle, IE. a right square. Pi might seem easier or obvious to you because you've already been dealing with it for years, but it still creates a situation that is more complex then it needs to be. Tau creates a simpler unit-circle, because Tau uses the radius, and we're talking about radians. Using something that's calculated using the diameter, when you're talking about a unit that's measured in radius's is asking for a mess.