Rationale for two pans is (apart from I like pans and have both a SS saute pan, well two actually, and a blue steel pan and a couple of non stick pans for other people to use):
Saute pan is great for cooking a wide range of sauces, one pot dishes etc. I don't find stainless good for just frying though. Which is where the blue / carbon steel pan comes in for eg frying eggs, bacon, sausages, liver, mushrooms etc.
Limitation of blue steel is that it doesn't play nice with tomato based sauces.
Rationale for two pans is (apart from I like pans and have both a SS saute pan, well two actually, and a blue steel pan and a couple of non stick pans for other people to use):
Saute pan is great for cooking a wide range of sauces, one pot dishes etc. I don't find stainless good for just frying though. Which is where the blue / carbon steel pan comes in for eg frying eggs, bacon, sausages, liver, mushrooms etc.
Limitation of blue steel is that it doesn't play nice with tomato based sauces.