Man this might be one of the hotter takes I've seen on this forum. Most of the points in the OP are demonstrably false by any objective measure.
What industry convention did Nintendo inch closer to with the Switch as a console? No other company touches a hybrid or dedicated handheld in today's mobile gaming climate. Smash is still a celebration of Nintendo, with some outside favorites making the roster. They capped off their Smash Direct with a fucking Pirahna Plant lmao, and you're going on about how they're not unique anymore. Pokémon will always pander to the originals, but we don't even know what gen 8 is yet. Mario Odyssey might not feel unique, but there isn't another game close to it that's out there. Labo, ARMS, 1-2 Switch, Mario Party...still pretty unique. And lmao at Breath of the Wild following industry trends. Don't let the fact that it was open world misguide your perception of its place in modern gaming. If anything it's closer to the original LoZ than it is any modern open world title. Other studios will be emulating it for years to come.
Just about the only thing Nintendo does that isn't as "unique" is their handling of patches and DLC, which they've managed to do better than the industry giants. Splatoon, BotW, Xenoblade Chronicles 2, and others are getting good post launch support and single player expansions...and even then, dlc that isn't cosmetic or multiplayer is incredibly unique these days. I get where you're coming from, but this is waaaaay off base, like or dislike Nintendo.