Migrate Drupal 8 to Drupal 9 (easy steps).

Drupal 9 was released to the public in June 2020, when Dries Buytaert, the founder of Drupal and project leader, said Drupal 9 was " the most author-friendly and powerful version of the platform to date."

Components Based Design in Drupal

"Components in Drupal can be defined as re-usable chunks of mark-up serving the atomic design principles"