Why De la Cruz did not pass onto the 'Final death'?
In the movie, De la Cruz is so busy to organize and celebrate the Day of the Dead (in the Land of the Dead, of course) and does not even seem to care about returning and meeting his family (if he has one?)
There are apparently so many people who remember him because he's famous. The movie didn't mention about his family but I suppose he doesn't have any descendant to remember him. (TBD)
Why didn't he pass onto the Final Death?
Héctor explained to Miguel that unless there's a relative in the living world who remembers their ancestor, their spirit passes onto what they call the final death, the same fate that awaits him if Miguel doesn't take his photo home. (Disney Wikia)
Best Answer
Based on my own assumption, to avoid final death all one has to do is to remember said person and it has nothing to do with family and relatives. If you remember:
Spoiler alert: Before Hector actually knows that Miguel is his great great grandson, he just wanted Miguel to put his photo among Miguels ancestors so that he can cross.
Miguel encounters Héctor, a down-on-his-luck skeleton who once played with Ernesto and offers to help Miguel reach him. In return, Héctor asks Miguel to take his photo back to the Land of the Living so he can visit his daughter before she forgets him and he disappears completely. Source
Thus based on that assumption, since everyone remembers De la Cruz and if you notice, the flowers leading to De la Cruz's museum, it's understandable that De La Cruz is remembered enough to not pass onto "Final Death".
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What happened to Ernesto de la Cruz at the end of the movie?
Just as he finished the song on a high note, the backstage hand was distracted and accidentally pulled the lever for the stage's bell; Ernesto, being right under the bell at the moment, was crushed by it and killed instantly.How old was Ernesto de la Cruz when he died?
Ernesto was born in 1896 and died in 1942, implying that he was 46 years old. Unlike most Pixar villains who die, Ernesto, like many characters in Coco, is already deceased at the beginning of the film and resides in the Land of the Dead.What happens to Héctor and Miguel after they learn the truth about Ernesto de la Cruz?
In 2017, H\xe9ctor helped his then-unknown great-great grandson, Miguel Rivera find Ernesto De la Cruz. However, they learned that they are in fact each other's family. He nearly succumbed to the Final Death, but Miguel was able to resurrect his memories in his daughter Coco.Why Did Ernesto De La Cruz Betray Hector? (Backstory Explained!) | Coco Theory
Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.
Images: Andrea Piacquadio, Roberto Nickson, Roberto Nickson, Paul Deetman