Originally Posted by Deadly
And very little if any rewriting of programs would be needed. The computer doesn't care whether you call it 2pi or tau, it's the same exact number. Also the symbol tau was chosen exactly to avoid many such issues, because it's already an existing symbol.
What about whenever a program tried to do anything with an older, existing program that had the same number defined as a different variable? Or if people went and grabbed existing code that already was using pi and tried to change or expand it, they'd have to go through and replace everything with tau, right?