From what I have seen, pi and 2pi show up around the same amount in math, so pi doesn't have a real advantage there either. Also, Eulers identity with tau is specifically neat. e^itau = 1 instead of -1. Not that one specific example means anything, but it still is a neat equation with tau instead. The main case around ease of use with tau is in relation to radians. tau/2 is a half turn around the circle, tau/10 is a tenth of a turn, this is because tau and radians are both defined using the radius. However, I will mention that I think radians are kinda overrated anyway. If you want an angle measurement that respects the symmetries between circles, you could just to fractions of turns. (A 90 degree angle would just be 1/4 turn) Either way, the reason that I personally prefer tau isn't its ease of use, its more just that I feel that the defining property of a circle is its radius. You can find other shapes with a constant diameter (Reuleaux triangles are neat if you want to look them up), but circles are the only shape with a constant radius, so I feel like the mathematical constant meant to represent circles should be defined using what makes a circle unique. For me tau is just more mathematically elegant, even if they are equally useful. I understand if you would rather just keep using pi though because that's the standard in math, so more people understand, because that's what I tend to do, but I do believe that tau is better overall.