Donald Duck and his nephews have been around for over 80 years. Scrooge McDuck has been around for 70 years. In that time, the Ducks have become international cultural institutions through their adventures in film and print, especially in Europe. Duck comics are the biggest sellers in many European markets, especially Italy and Scandinavia, to the point where Donald Duck's only rivals in comics overall are Superman, Batman, Spider-Man and Wolverine. Every Christmas, Swedish people watch the old Walt-era Christmas special "From All of Us to All of You", which just gets referred to as "Christmas with Donald Duck". The Finnish metal band Nightwish made an album based on the Life and Times of Scrooge McDuck that became a top seller in the country for months. Scandinavian Dungeons and Dragons added a Duck Race.
Osamu Tezuka, the manga artist often credited in establishing many parts of the anime style, took a lot of inspiration from Carl Barks and his Duck books in addition to Disney in general, so all anime can basically be traced to Scrooge. George Lucas and Steven Spielberg based the opening of Raiders of the Lost Ark on various Scrooge McDuck comic books. Scientists actually tried a method of raising sunken ships using ping-pong balls because they read it in a Donald Duck comic and it worked.
Could keep rambling on about people's passion for cartoon ducks, but there's a reason why the original Ducktales is so fondly remembered and why the reboot became a hit. Phineas and Ferb was a great show, but its time has mostly passed and Ducks are eternal and that is not an opinion.
