This shows how every hose looked after I removed them from my Vanagon, about 20 hose ends. Note that the end of the hose (where the clamp compresses the rubber) is chock full of splits. There is no discernible damage in the middle of the hose, despite being run on a 10% Et-OH mix for many years (in Oregon).
Like every other rubber component on the car, fuel hoses need to be replaced periodically.