Angular Reactive Forms Mastery Hub: The Industry Practice Te

In the context of Angular Reactive Forms, when aiming for optimal performance with complex, deeply nested form structures, which of the following strategies is *least* recommended for managing state and updates?

Consider a scenario where a user needs to input a list of email addresses, with the ability to add or remove them dynamically. The validation requires each email to be unique within the list and also globally unique across all instances of this form component on the page. Which approach best addresses the *global uniqueness* validation requirement within Angular Reactive Forms?

When designing a complex form with conditional fields that appear or disappear based on the values of other controls, what is the most robust and performant way to manage the underlying `FormGroup` structure in Angular Reactive Forms?