While it is possible to sauté in a straight-sided sauté pan, it's not easy, requiring constant stirring and turning with a wooden spoon or spatula.
No, you should hand-wash all non-stick cookware to ensure its longevity. Strong dishwashing detergents and the high heat from the dishwasher will damage the non-stick coating over time.
With their flared rims, skillets provide a wide, open view and convenient access to stir, move, or flip ingredients around. The smooth, curved sides also help you quickly slide a finished dish from fry pan to plate.