This site was built with Drupal 8.
Drupal 8 was released in September 2016 and is maturing rapidly, to the point that fairly complex website requirements can be met with core and contributed modules, usually with no need for custom code.
This site has been built with Drupal 8, and a relatively small number of contributed modules such as paragraphs, pathauto, token, ctools and google_analytics.
...and themed with Bootstrap 3.
Bootstrap works just great with Drupal 8 to achieve mobile-first responsive layouts.
Parallax effects, accordions, masonry galleries are all possible with a minimum of fuss.