The "Aha!" moment isn't enough anymore. What comes next?

When we first launched, we celebrated every activation milestone like a major win. But a few months in, we noticed a brutal pattern: users hit our "Aha!" moment, loved the onboarding, and still churned by week three.

Turns out, experiencing value once isn't the same as building a habit.

For those running SaaS products, how do you bridge the gap between initial onboarding and making your tool an absolute daily non-negotiable? Do you rely on lifecycle emails, in-app nudges, or something else entirely?