Good question. OPA is best suited for ABAC-centric scenarios, where your authorization logic is expressed in terms of attributes on users, objects, or environme

Good question. OPA is best suited for ABAC-centric scenarios, where your authorization logic is expressed in terms of attributes on users, objects, or environment. The ReBAC / Zanzibar model is more opinionated, but most use-cases seem to be pretty easily described in ReBAC.