In most of the applications, Business requires the User Identify Management module, where Admin users can create user, modify user, and control the granular level role of users. There is always a need for a user management module for any application with the following basic requirements with a simplistic Pega standard UI.

1. Create a user
2. Update a user 
3. Delete/De-activate user
4. Modify the roles/access group of user
5. Bulk User creation
6. SCIM complaint rest APIs for user management from the external Legacy application.
7. Include a placeholder of external authentication integration

This functionality can be easily reused from the component/ruleset for quicker development. I think this feature should be present in the product.