High portfolio churn is conventionally perceived to have a negative impact on investment returns, due to the shorter holding periods for good stocks. However, advanced technology, such as AI, has disrupted this practice. The decision of how much of the portfolio to churn is a function of the returns that an investor can generate from that churn. Recent advances in AI provide investors with more personalized investment capabilities and, ultimately, greater potential returns. As a successful investor, it is important to be both active and passive.