Ravenous: Part 1 - create-react-app did not produce a render function in App.js


I assume that there have been some updates to the create-react-app command where the default App.js files gives an output like:

function App() {
  return (
    <div className="App">
      <header className="App-header">
        <img src={logo} className="App-logo" alt="logo" />
          Edit <code>src/App.js</code> and save to reload.
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The project requires us to edit the “render()” method with the app component (STEP 46). However this is no longer what the command produces. I assume the project will still work when I modify the return statement, but can someone explain why there is no an “App” component with a render function in this file? Is there a particular reason? Would this file function just fine if I replaced everything with the typical static components we have created so far?