I have been working with Drupal for over 15 years, starting with Drupal 6, then mainly Drupal 7, which is where I have carried out the vast majority of my projects, and lately, of course, Drupal 8, 9, 10, and some Drupal 11. For work reasons, I need the certificate, as it is increasingly required for jobs and tenders. What was going to be a simple formality has become a continuous learning experience. Seeing how things are done from another perspective, seeing modules that I have not worked with before, and other ways of working is very enriching.