I think part of the success is that Nintendo has become smarter in how to release their software:
2017: Start with bangers back-to-back: Zelda: BotW, Mario Kart 8, Splatoon 2, Super Mario Odyssey.
2018: Then as they see the success and the console will continue to sell based on the already released games they slow down: Captain Toad, DK: TF, Kirby Star Allies, Mario Tennis Aces and end the year with bangers: Super Mario Party, Pokémon Let's Go and Super Smash Bros.
2019: Keep the momentum with New Super Mario Bros. U Deluxe, Yoshi's Crafted World, Fire Emblem: Three Houses, Marvel Ultimate Alliance 3: The Black Order, Super Mario Maker 2 (banger) and again end the year with bangers: Ring Fit Adventure, Luigi's Mansion 3 and Pokémon Sword/Shield
2020: Covid-19 and the massive success of Switch hits Nintendo. They can't produce enough Switches, so they have to slow down (also the teams are hindered to release games on time): Animal Crossing: New Horizon is such a gigantic hit that Nintendo can set in the cruise mode for the rest of the year. If they would bring out another big hit title this year it would only cause an even greater shortage of Switches. Nevertheless, they still bring out decent other hits during the year: Paper Mario: The Origami King and Clubhouse Games and end the year with a banger: Super Mario 3D All-Stars and with a another respectable success: Hyrule Warriors: Age of Calamity
2021 (known so far): Started great with Super Mario 3D World, continues strong with New Pokémon Snap, Miitopia, Mario Golf: Super Rush and Zelda: Skyward Sword HD and will end the year with at least one banger: Pokémon Brilliant Diamond/Shining Pearl
Soon, the Switch is 5 years old but still has lots of steam in it. Sure hits still to come: Pokémon Legends: Arceus, Splatoon 3, Metroid Prime 4, Bayonetta 3 and Zelda: BotW 2.
Possible other hits: Super Mario Odyssey 2, Mario Kart 9, Super Mario Party 2, new generation of mainline Pokémon, Nintendogs/cats, Wii Sports, completely new 2d Mario game, Starfox, F-Zero, Waverace, Golden Sun, Mother/Earthbound, Advance Wars, completely new 2d Zelda game, new 3d and/or 2d Donkey Kong, New Fire Emblem and/or Fire Emblem remake, Wario World, etc., etc. incl. completely new IP's (I think Retro Studios has something new in the oven since quite some time) and some big 3rd party exclusive (my wet dream Nintendo vs. Capcom).
All in all, Nintendo really spread out their hits wisely and after 5 years there's still much left to offer to land some big hits!







