Are you interested in creating your Drupal site's front-end (theme) entirely with modern JavaScript code instead of Twig and PHP, but you simultaneously want it to be a traditional (not Decoupled) Drupal site where your site builders and content editors can use Block UI, Layout Builder, Views, Display Suite, Paragraphs, Webform, and all of the other Drupal modules they're used to using, for configuring what Drupal renders where and how? If so, then hopefully some day this theme engine will be for you!