Ok, it’s not 2PiR now, but just PiR. Given how often 2Pi is used some mathematicians will actually be happy. Would be a mess with other constants though.
Edit. Also all the people in IT will have a terrible week trying to figure out why their programs started working weird, then figuring out why they even need those constants. Log messages would be funny though.



I actually hate it, it should be reversed: π = 2 τ like it’s visually fitting.