Drupal is one of the most robust and widely-used open source CMS (Content Management System). All kinds of websites, from small to huge, use Drupal as a platform--in fact Synthmode.com was developed using Drupal.
Drupal 8 has been in development for over 4 years and as of today, there are only 4 critical issues remaining before Drupal 8 can move onto a release candidate version. This release will implement some major changes, including an entirely new theming engine. You can find a full list of features here: https://www.drupal.org/drupal-8.0
As usual, early adopters are likely to pay the price finding nuances and bugs here and there... but for most techies it should be a no-brainer.