Streaks are a widely used retention mechanic, but they carry hidden risks that product managers often overlook. While they can drive daily active users and session frequency, they can also shift user motivation from achieving goals to merely maintaining a number. This creates fragile engagement, low-quality interactions, and sharp churn after a streak breaks. The post outlines when streaks genuinely help (habit formation, onboarding, behaviors where frequency drives outcomes) and when they don't (low-frequency-use products, arbitrary check-ins). It recommends designing more flexible systems with weekly targets, streak freezes, soft resets, and outcome-based milestones instead of rigid daily counters. PMs are advised to treat streaks as experiments, measure reactivation rates after breakage, and ask whether users would still engage if the streak disappeared.