The pistons in an F-1 car don't last for 100,000 miles nor do those in racing motorcycles. The purpose of light weight parts is to be as strong as necessary to get the job done for the season at best. We know this and that is why we make the Hardcore and Pro Series lines to meet the needs of different riders. Shimano's designs may not be the flashiest, lightest or newest around but they are tried and true. You can also find parts virtually any where.
Innovation is important though it drives the industry and eventually improves existing equipment.
Most of us want more than a season's use out of that shiny new widget. Check the all telling warranty and ask questions about exclusions or the period specified. Respect the companies that tell you the truth even if its' not what you want to hear. Those are the people you want to do business with. If the answers are vague or sound too good to be true look else where.