Some people also use noodle rods for FLY FISHING for steelhead up at Erie. They use these long, soft action rods so they have a long reach for controlling the drift of egg patterns and nymphs, and so they can use light leaders when the water is clear and have all that flex in the rod to protect the tippet when a big steelie takes off.
So it's a pretty specialized kind of rod, for people who do a LOT of steelheading and want this kind of specialized outfit. Most people just use a more standard type of 9 foot rod, that you can also use for bass fishing, light saltwater etc.