Just over 10 years ago I settled on a single content management system as the thing that I would use as the core of my development work. At the time Drupal 4.6 was the bleeding edge and it was... okay. It was the best of a fairly rough bunch. In fairness though, that opinion is from my current position with 20:20 hindsight.
Seventeen years ago today Dries released Drupal 1.0 under an open source licence and things have only gotten better since then.