The Social Burden of Longer Lives
Adam and Eve lost it, alchemists tried to brew it and, if you believe the legends, Spanish conquistador Juan Ponce de Leon was searching for it when he discovered Florida. To live forever while preserving health and retaining the semblance and vigor of youth is one of humanity's oldest and most elusive goals.
Ref. https://news.yahoo.com/s/space/20060522/sc_...enoflongerlives
Living longer would only be beneficial if you were still fit enough to live life. If you have to be taken care of, then its not only a burden to others, but a burden on your spirit. You would be alive, but dead inside. That would be a fate worse than death.