This is just a different use of the same concept, as I and the article said. A feature flag grants or denies access to a feature in exactly the same way as aut

This is just a different use of the same concept, as I and the article said. A feature flag grants or denies access to a feature in exactly the same way as authorization - you could have 'feature' attributes in an ABAC system for example, and in fact I'm sure many systems use exactly this to provide feature tiers. It's just that feature flags are generally used for a different purpose, ie targeted roll-out of new functionality, ie different policy concerns. So, different uses, different policies, but the same abstraction/concept.