I love my stainless steel Wolf cooktop, but it's a real PITA to clean. I keep the exhaust fan going when I fry, but it seems to have little impact on the mess I make when I cook. especially when I'm frying anything - even light pan searing makes a mess. And not just on the burner I'm using - the whole cooktop has to be cleaned, and it's not a simple matter. The iron grates are large and heavy. And I find if I don't clean up, the next time I cook the grease really bakes on and is that much harder to clean.
Here and there I use splatter shields, but it's usually when I first put the food in, even just chopped onions to be sauteed, that a big cleanup becomes inevitable.