When to use Razor Pages vs. MVC is a question every senior .NET developer must be able to answer. Razor Pages are the default for lightweight or page-focused applications.
Best for **Page-Focused** scenarios like Admin Dashboards, Contact Forms, and simple CRUD. No need to jump between Controller and View.
Best for **Data-Focused** scenarios with multiple views for the same logic (e.g. Mobile View vs Desktop View) or complex API-driven workflows.
Professional .NET apps often use **BOTH**. You can use Razor Pages for simple admin screens and MVC for the complex public-facing product catalog. Both run on the same middleware and share the same Dependency Injection container.