Fast feedback is one of our core values for building software. For many years, we've used the canary release approach to encourage early feedback on new software versions, while reducing the risk through incremental rollout to selected users. One of the questions regarding this technique is how to segment users. Canary releases to a very small segment (say 1%) of users can be a catalyst for change. While starting with a very small segment of users enables teams to get comfortable with the technique, capturing fast user feedback enables diverse teams to observe the impact of new releases and learn and adjust course as necessary—a priceless change in engineering culture. We call this, the mighty 1% canary.