This site was originally WordPress. I migrated it to Backdrop CMS. The theme uses Bootstrap 5, which I began using in both Drupal and Backdrop projects. The site makes extensive use of the Paragraphs module. I created a config recipe of paragraph types that I can install on any site. This also turned into Drupal config recipe of paragraph types. As explained in the article I wrote for Drupal Camp Asheville the site uses the Headless module to create a decoupled React component.