Yeah, the best become anime (if based on a Manga. Times may be a changin) so they pretty much always get to tell their whole story. Or they’re actually designed to be a single season or two instead of trying to become a cash cow that goes on way too long. NGE, Cowboy Bebop, Death Note, Love Hina, and several of the Gundam animes were all great single season stories. No 10 years of fluff.