Pie menus are often used in 3D modelling programs (Maya, I think Blender and SolidWorks). The situation seems to be:
"I'm a professional in a kind of flow state, I frequently need extremely quick access to a fairly small subset of context-sensitive commands, I'd ideally not like to move my mouse too much away from the thing I'm focused on, much of my work is mouse-driven because it involves making fine visually-directed adjustments by dragging the mouse."
"I'm a professional in a kind of flow state, I frequently need extremely quick access to a fairly small subset of context-sensitive commands, I'd ideally not like to move my mouse too much away from the thing I'm focused on, much of my work is mouse-driven because it involves making fine visually-directed adjustments by dragging the mouse."