A release can be rolled back with one command

Every release we ship is now kept, the last five of them, and one command puts a previous one back. After each release the script waits until the platform reports the new version as healthy; if it does not, the release is marked red with the rollback command next to it. A release also needs a changelog entry now, so this page cannot quietly fall behind. What you notice: nothing, until something goes wrong, and then a shorter wait.