Agreed, mainly because it's already used so widely in so many very standardized ways (including many constants). In particular, note that it's used for torque.

Agreed, mainly because it's already used so widely in so many very standardized ways (including many constants). In particular, note that it's used for torque. The formula for torque from force and radius involves a cross-product, so you're very likely to need both the constant conversion factor for radians/cycle and the variable for torque.