I don't care what the engineers, builders or test data says, composite material does NOT belong in a commercial airliner. Take the 1965-1985 era of manufacturing and engineering as example and compare the following years as plastics and composites began to replace the stout and durable craftsmanship who's longevity far outlasts its current replacements. Think of your lawn mowers, vehicles, power tools etc and compare the amount of composites and plastics that have replaced the manufacturing process. Plastic is for weekend warriors not the professional operator. It will take years of trouble free and reliable service to convince me that cheap lightweight composite material will outlast the durability of aluminum.