New Twiddle

components.glimmer-parent-component\.js

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

export default class extends Component {
  @tracked greatProperty = false;
  
  @action
  toggle(){
  	this.greatProperty = !this.greatProperty;
  }
}

components.old-ember-child-component\.js

import Component from '@ember/component';
import { computed } from "@ember/object";

export default Component.extend({
  didReceiveAttrs(){
    this._super(...arguments);

    let options = this.attrs;
    Object.keys(options).forEach(function(key){
      if (options[key].value) {
        options[key] = options[key].value
      }
    });
    this.set('options', options);
  },
  
  workaroundValue: computed('options.greatProperty', function(){
    if (this.options.greatProperty.hasOwnProperty("value") && this.options.greatProperty.value == false) {
      return false;
    } else {
      return this.options.greatProperty;
    }
  })
});

controllers.application\.js

import Controller from '@ember/controller';

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

templates.application\.hbs

<GlimmerParentComponent />
<br>
<br>

templates.components.glimmer-parent-component\.hbs

<button type="boolean" value={{this.greatProperty}} {{on 'click' this.toggle }}>Toggle</button>
<br>
<br>
value in glimmer component: {{this.greatProperty}}
<br>
<br>
{{component "old-ember-child-component" greatProperty=this.greatProperty}}
<br>
<br>

templates.components.old-ember-child-component\.hbs

value in old ember component: {{options.greatProperty}}
<br>
<br>
=> workaround value: {{workaroundValue}}

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"
  }
}