I knew it wasn't just me when I thought ratings and popularity declined (I was there the moment the popularity sunk). I saw a source that it was the highest rated cartoon on Disney Channel as of 2013, so I am confused. It's even sadder when you consider that when the show first came out, it was viewed as the "only good modern cartoon" and "the savior of modern animation" by many people. Part of the show's popularity between kids and adults was because it was the only cartoon on at the time besides SpongeBob (make of what you will of the new episodes) that had a general appeal. It was around before Regular Show, Adventure Time, FIM and Gravity Falls. When the aforementioned 4 became popular, I think the novelty of Phineas and Ferb wore off quite slowly to the point of declining ratings (I love all shows in their own way but I'm speaking realistically) and many people questioning why the show was ever popular in the first place. I like WOY but I don't understand how it's not reeling in ratings. I know that Disney Channel had plans to turn Phineas and Ferb into their SpongeBob though that was instantly scrapped when Gravity Falls came out and many of Phineas and Ferb's fans dumped Phineas and Ferb not too long after (which was the start of the ratings decline for PnF) and merchandise was pulled from stores. Not too different from what happened to Ren and Stimpy in it's Nickelodeon years.