I was skeptical, but tentatively convinced by the end of the section on the hypersphere volume/surface area. I don't think it's worth actually changing things,

I was skeptical, but tentatively convinced by the end of the section on the hypersphere volume/surface area. I don't think it's worth actually changing things, but if we can accept that 2pi is a more natural constant than pi, then it should help us write more sensible formulas, even if the symbol tau isn't used.