Explore our article: How four Symfony Components + Twig help simplify Drupal Core. It is a follow-on to our article, “How Symfony components power Drupal’s drive to new frontiers”. It looks at the nuts and bolts of four of the Symfony components/libraries Drupal uses, plus the Twig templating engine.
https://symfonystation.mobileatom.net/Symfony-Components-Twig-Drupal-Core
