Error boundaries are broken – signals can fix them

Error boundaries in component-based frameworks only catch synchronous render-time failures, leaving async operations, event handlers, and background tasks unprotected. Signals offer a superior alternative by treating errors as reactive state that flows through the application independently of the component tree. This approach enables consistent error handling across all code paths, granular error isolation that preserves user state, and automatic UI updates without prop drilling or context overhead. The shift from error boundaries to signals represents an architectural improvement that leads to more resilient applications with fewer full-page crashes.