Millennials are reportedly losing interest in certain online activities, with some outlets suggesting they are tired of specific things, although the number of things they are tired of is unclear, with reports ranging from 5 to 11. The generation's preferences and behaviors are also shifting in other areas, such as payment methods and credit card loyalty. Additionally, millennials' overall happiness and resilience are being studied, with some research suggesting that their 40s may be a particularly unhappy time.