tracked vs computed

components.test-component\.js

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { computed } from '@ember/object';

export default class extends Component {
  @tracked sortBy = "test";

	incredibleArray = [];

	get currentSortBy() {
  	return `current sortBy is ${this.sortBy}`;
  }

	@computed('incredibleArray.[]')
	get isThisRecomputed() {
  	return `Computed sortBy is: ${this.sortBy}`;
  }
}

controllers.application\.js

import Controller from '@ember/controller';

export default class ApplicationController extends Controller {
  appName = 'Ember Twiddle';
}

templates.application\.hbs

<TestComponent/>
{{outlet}}

templates.components.other-component\.hbs

<button {{on "click" (action @change "something else")}}>changeit</button>

templates.components.test-component\.hbs

{{this.currentSortBy}}
<br>
{{this.isThisRecomputed}}
<OtherComponent @sortBy={{this.sortBy}} @change={{action (mut this.sortBy)}}/>

twiddle\.json

{
  "version": "0.17.1",
  "EmberENV": {
    "FEATURES": {},
    "_TEMPLATE_ONLY_GLIMMER_COMPONENTS": false,
    "_APPLICATION_TEMPLATE_WRAPPER": true,
    "_JQUERY_INTEGRATION": true
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.js",
    "ember": "3.18.1",
    "ember-template-compiler": "3.18.1",
    "ember-testing": "3.18.1"
  },
  "addons": {
    "@glimmer/component": "1.0.0"
  }
}