Are routing files a thing of the past in PHP?

The one link that got my attention in this weeks The Weekly Drop was PHP Attributes Can Be Used for Route Definition and Discovery

As a long time user of Symfony this feels like Drupal is catching up, and I'm all for it. The Drupal developers are really embracing attributes. The first time I noticed it is when they started using it for hooks.

Next to the Route attribute the change also allows the use of invokable controllers. From the Drupal article:

namespace Drupal\router_test\Controller;

use Drupal\Core\Controller\ControllerBase;
use Symfony\Component\Routing\Annotation\Route;

/**
 * Test controller.
 */
#[Route(
  '/test_class_attribute',
  'test_class_attribute',
  requirements: ['_access' => 'TRUE']
)]
class TestClassAttribute extends ControllerBase {

  /**
   * Provides test content.
   */
  public function __invoke() {
    return ['#markup' => 'Testing __invoke() with a Route attribute on the class'];
  }

}

I see quite a few people using single route controllers. And to me it doesn't make sense having to name a method when PHP provides a way to invoke a class with a single public method.

With Symfony, Tempest and now Drupal offering attribute based routing, it looks like Laravel is the biggest framework that doesn't uses attributes for routing.
Laravel already has middleware attributes. This is one of the parts of the routing that is heavily used.

There is a third party package that makes it possible to use attributes for routing.
And you can use it with the Laravel middleware attributes.
This shows it could be a core feature.

It would be amazing when the frameworks could create a standard for the routing attributes. This would make it possible to use controllers in multiple PHP solutions with a few changes or a framework discovery feature.

What is your route attribute use? When you use a router config file, what is stopping you from using attributes?