The reasons I reach for Elixir and Phoenix over any other languages and frameworks for web development are:<p>1. Excellent tooling (e.g., Mix, IEx, Formatter, testing, debugging, Credo, ExDoc, Livebook, etc.)<p>2. Excellent concurrency and fault tolerance.<p>3. Ability to handle extremely large numbers of simultaneous connections in an efficient manner.<p>4. Lightweight processes that handle both vertical and horizontal scaling.<p>5. Phoenix channels.<p>6. Full-stack development support.<p>7. Supervision trees.<p>8. Macro support.<p>9. Interoperability with Erlang.<p>10. One of the most supportive communities I've experienced.<p>11. Excellent error messages and debug support.<p>12. Excellent testing framework.<p>13. Good support in my editor of choice (Helix).<p>14. Mike and Nicole at Pragmatic Studio (for teaching new hires who don't know Elixir).