# Why is \Pr not defined using \nolimits?

Plain TeX defines \Pr as

\def\Pr{\mathop{\rm Pr}}

LaTeX and ConTeXt define it similarly (with some syntax sugar around the choice of the font). To me, a more reasonable definition is

\def\Pr{\mathop{\rm Pr}\nolimits}

so that constructs like \Pr^{f}(X) look nice.

Are there any scenarios where the tradition TeX definition is more appropriate than the latter?

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