A scenario where this is useful: sRGB EOTF vs power gamma 2 content, where you can use the key-bind for trial and error indemnification or when you already know you need sRGB.
Video games, and movies, already get all the love they need on IPS from Gamma 2.2 but for proper internet browsing and experience with some images, it's necessary to often switch back to the sRGB .cube
A scenario where this is useful: sRGB EOTF vs power gamma 2 content, where you can use the key-bind for trial and error indemnification or when you already know you need sRGB. Video games, and movies, already get all the love they need on IPS from Gamma 2.2 but for proper internet browsing and experience with some images, it's necessary to often switch back to the sRGB .cube