Dear Swansont, yesterday I just stumbled on the Scienceforums.net while doing some research. Honestly, I just discovered it. I was really amused by, actually, your comments and I had the impression that you had good understanding of physics. This is the reason why I posted my paper here. Elegance and symmetry are underlying principles of mathematics, group theory, ... Let me cite Paul Adrian Dirac: "What makes the theory of relativity so acceptable to physicists in spite of its going against the principle of simplicity is its great mathematical beauty. This is a quality which cannot be defined, any more than beauty in art can be defined, but which people who study mathematics usually have no difficulty in appreciating. The theory of relativity introduced mathematical beauty to an unprecedented extent into the description of Nature." Unfortunately, why it is more elegant - in most cases - to use tau instead of pi cannot be defined. A French croissant tastes imo better than a croissant from country y, but I would have great difficulties to explain why, it is difficult to define taste. (As a sidenote, with respect to tau, I may suggest you to read the Tau Manifesto: https://tauday.com/tau-manifesto).