Phoenix

Phoenix (Elixir) provides real-time scalability (millions of connections). v1.7 + LiveView allows building rich SPAs without writing JavaScript.

When to Use

• Real-time: Chat apps, live dashboards (Channels).
• High Concurrency: Leveraging the BEAM VM (Erlang).
• Low JS: LiveView handles the UI state on the server.

Core Concepts

LiveView

Server-rendered HTML that updates over WebSockets. "The server is the state source".

Ecto

The database wrapper. Using Changeset for validation.