If you put new code into production, that is a deployment and an engineering release. If some of that new code is a flag that controls what customers see, then

If you put new code into production, that is a deployment and an engineering release. If some of that new code is a flag that controls what customers see, then from a product perspective it’s not a “product release”. Is that what you mean? The point is, even feature-flagged code can break things unexpectedly.