I like dado blades for dados, I do not use one of my routers unless the workpiece is quite large. If you needed dados all along the workpiece, it is very handy to arrange the dados so you can cut from both sides. That keeps you from trying to cut a dado so far out from the fence. That doesn't work with a stopped dado. Any table saw cut where the width and length of the workpiece is similar is dangerous on the table saw. A dado goes from a dangerous to a normal type cut when you cut only the half of the workpiece closet to the rip fence (assuming a roughly square piece).