Do I need to set all my routes in Routes.php?

Struggling along trying to recreate my REST API from CI3 in CI4-beta4. I find it very cumbersome to configure all my route entries in Routes.php like this (far from complete):

PHP Code:

$routes->group('users', function ($routes) {
    $routes->get('list', 'Users::list');
    $routes->get('(:num)', 'Users::get_user/$i');
    $routes->options('(:any)', 'Users::options_respond');
}); 


Is there a way to have the routes live in the Controller instead or am I overthinking this?