Why Can't Angular Cast An Element to Another?

Angular cannot support the polymorphic 'as' prop pattern common in React and Vue due to its architecture. Angular is a template-compiled framework where the compiler generates static blueprint functions at build time, leaving the runtime with minimal DOM manipulation capabilities. Adding a dynamic element-casting API would require a more expressive runtime, leading to bundle bloat and slower parsing. As a workaround, Angular's attribute selectors allow attaching component behavior to existing HTML elements (e.g., `a[our-button]` or `button[our-button]`), achieving similar visual results without dynamic element creation.