People are living longer, prompting a need to plan for extended retirements that could last into one's hundreds. This has led to various responses, including the development of tools and strategies to support longevity, as well as investment in startups focused on aging. Some experts and individuals, including a notable public figure, are sharing lessons and insights on preparing for a longer life, while others are warning that societies may not be adequately prepared for the implications of increased longevity.