> "Are you looking at your image at 100% magnification?"
I am aware that some things are only visible at 100% (or more). And I think that I understand at least some of the reasons.
But Bruce Fraser, in his (awesome) "Image Sharpening" book talks about viewing at lower %s (eg. 25% or 50%) to get a better impression for some purposes. These purposes are typically about output sharpening, which isn't specifically what ACR sharpening is for.
But for those who intend to compress the stages into one, perhaps being ably to view the sharpening effect at 25% or 50% would also be useful. (Not intermediate stages!)