Incorrect (sequential loading, 3 round trips):

// app/routes/dashboard.js
import Route from '@ember/routing/route';
import { service } from '@ember/service';

export default class DashboardRoute extends Route {
  @service store;

  async model() {
    const user = await this.store.request({ url: '/users/me' });
    const posts = await this.store.request({ url: '/posts?recent=true' });
    const notifications = await this.store.request({ url: '/notifications?unread=true' });

    return { user, posts, notifications };
  }
}