Launch day is rarely where software succeeds or fails. It is the weeks after, when real people meet it in the middle of real work. So we release in stages: one team, then four, then everyone, about three weeks apart.
The staged rollout is not caution for its own sake. Each cohort surfaces a different class of problem. In our experience the first finds the bugs, the second finds the missing permissions, and the third finds that the notification defaults are wrong for anyone who isn't already looking at the product all day.
The practice we keep everywhere: the engineers who wrote each area handle its support during rollout. Feedback arrives at the person who can act on it, without a translation layer, and fixes land in days rather than sprints.
The thing we changed: we now instrument the empty states. It is easy to measure everything people do and nothing about the moments they open a screen and find nothing useful. That is now on every rollout plan we write.
