I'm trying to remember what sort of mickey mouse sander that might be.
I think you mean a 4 by 4 square or something?? Or the bigger rectangular, which porter cable/rockwell did make one of. Those things all seemed to go away in woodworking when 5" & 6" random orbital sanders popularly got into market. With any sander/ polisher you have different motions & stroke lengths. Larger is more aggressive & smaller is finer generally.
I'd say inefficient at best & you're stuck cutting sheet paper for it. Rotary/ da sheets can be a different type of paper sometimes.