Strapi v4 has been released and is now live, with its official demo app FoodAdvisor powered by it. The release was made possible after upgrading the architecture of the Strapi app and remaking the front-end with Next.js. The new version offers a better idea of what can be achieved with Strapi, and users can try it for free on various platforms such as their computer or Gitpod. The demo showcases customizations that demonstrate how to properly use Injection Zones in Strapi's admin interface, including features like preview buttons, tweet buttons, and draft filters.