I have tried the www.drupalforge.org offerings over the last few months. It is a great way to test and build on Drupal 11, Drupal 10, and also DrupalCMS as well as BackdropCMS. Now that the drupalforge template is using the latest DrupalCMS repo I think it is a good idea to consider extending the DrupalCMS repo this way beyond just a ddev approach. This may also serve as an example of how the DrupalCMS repo may be extended for other environments such as lando. I support revisiting this.
It is great to see Drupal Forge including Backdrop CMS as part of the drupal family since it is a fork of Drupal 7 that has grown over the 10 years since its inception including the option for Drupal 7 sites to update to Backdrop CMS. Also Backdrop CMS includes features found in modern Drupal versions, including CKEditor 5, configuration management in json files or the database and many more features.
The Drupal Forge template is a rapid way to test or build sites with Backdrop CMS, https://www.drupalforge.org/template/backdrop-cms, and other versions of Drupal. There is also a recording on YouTube of the August 29, 2024 Backdrop User meeting where Drupal Forge was demonstrated. https://www.youtube.com/watch?v=w1xPAGg22UY
Queued patch in #17 for additional testing with php 7.4 and php 8.0