One thing that having separate production / test / development systems allows you to do is have discrete access permissions for test and dev that can enable a wide range of users to test and review, without in some cases requiring a login but instead checking IP or other details.
Through using different urls it’s possible to setup some production / test / development separation in Matrix, but access permissions are still an issue.
Has anyone ever looked into a way to enable public previewing of changes or under construction assets via a public test url?