Drupal 7 : great product, worked fine. Drupal 8 : “Let’s change everything including the module architecture.” Not a disaster if not for some critical modules

Drupal 7 : great product, worked fine. Drupal 8 : “Let’s change everything including the module architecture.” Not a disaster if not for some critical modules that I needed, that took more than 3 years to be converted, at which point D9 was already in the works. I do sometimes miss Drupals fields and views system, that was quite good.