The developers come in all flavors, too. I spend my time writing Drupal code and the average quality is fairly high. (Code quality in the Drupal project itself

The developers come in all flavors, too. I spend my time writing Drupal code and the average quality is fairly high. (Code quality in the Drupal project itself has always been high, in fact, even when PHP was a disaster on wheels.) So it depends on what those people writing PHP for two decades have been working on.