Core Philosophies:
- React (v22): 'Learn once, write anywhere' - Emphasizes component composition and unidirectional data flow
- Vue (v4): Progressive framework - Can scale from lightweight interactivity to full SPA
- Svelte (v5): Compiler-first approach - Shifts work to compile time for lean runtime
- Angular (v18): Full-featured MVC framework - Opinionated structure for large teams