Angular's `paramsInheritanceStrategy` router option, when set to `always`, gives child routes automatic access to all parent route params and data — eliminating the need for brittle manual parent traversal code. By default (`emptyOnly`), child routes only inherit params when no component is bound to the parent route. Setting it to `always` makes route params reusable, easier to understand, and resilient to route restructuring. One caveat: params with the same name are resolved by proximity to the active route, so unique parameter names are recommended.
