F-Zero is because when Mario Kart 8 specifically uses F-Zero through anti-gravity and 200cc addition, Miyamoto couldn’t figure out what to do. F-Zero needs to be restarted/gi header to be separated from Mario Kart 8.
Star Fox has long suffered from the derailment of the Star Fox Adventures franchise. Nintendo tried to remake Star Fox 64 and restart Star Fox 64, but failed to resurrect the series (the latter failed because Wii U and hardcore players refused to leave their comfort zone). Ubisoft’s use of Star Fox can’t even do anything. Fox Star is dead. Maybe in 30 years, Nintendo can try to restart the series again (at the same time, Nintendo will re-release Star Fox 1, 2 and 64 again and again).
Kid Icarus is mainly because no one is present. If no one is present, no one can successfully develop a new Kid Icarus game. Sakurai did temporarily restore KI̵
All other secondary IPs are IPs that only meet expectations or are insufficient. Some of Nintendo’s new IPs in the 3DS era cannot be used in Switch. Since Wii U/3DS, Mallo and Pushmo have never appeared again. Sakura Samurai has no new games since 3DS. There are many other examples.
If no one buys these mini games, then Nintendo has no choice but to make Mario, Mario Kart, Zelda and Smash Bros. games (and occasionally receive Pokemon games from The Pokemon Company). Yes, this means buying unnecessary games, such as Paper Mario: Origami King and Star Fox Zero (Wii U).
By not buying small games and changing formulas or games with non-traditional controls, you will see that Nintendo is now playing a third-party production role (after all, people have always wanted Nintendo to be a third-party, and now we see them in the third party In the production frenzy, apart from Nintendo’s main AAA games, there are almost no other games.