Nintendo

I'd agree with this. From story and gameplay standpoints, Scarlet/Violet are among the best mainline games in the series, leagues above Sword/Shield (story wise, don't know if they beat Sun/Moon, though). They gave us an open world, a battle gimmick that's balanced well enough to at least not be broken, allowed us to ride the legendary pokemon (as goofy as the designs are) to get around that world, and let us do things in essentially any order. All things fans have been begging GF for for a long time. Unfortunately Pokemon is a huge franchise that relies on so much other media by design that it's tough to allow GF the time they need to give the games the optimization they need. You delay the main games, you then also have to delay the anime and anime movies, the card game, and all the events built around those things as well. It's a major part of how the franchise has become the #1 grossing media franchise in history. That money train can't wait.

Franchises like Mario and Zelda, on the other hand, don't have nearly as much other merchandise or other moving parts to their brands that would have to wait for the new game release, and even then, that other merchandise isn't nearly as big a share of their overall brand as in Pokemon; they don't have anime, Mario only has one movie (we acknowledge) that wasn't connected to a specific entry in the franchise, and so without all that other stuff tied to specific games or "generations", other franchises can much better afford delays. They're mainly about the video games, and when a new mainline Mario/Zelda/etc game comes out, it's an event in itself that may actually benefit from a delay to further build hype.