I certainly think 2020 was more of a lull year than you mentioned. Yes, Animal Crossing: New Horizons did release in 2020 and it was massive. But Nintendo's first-party support could've been better and was more comparable to 2018 than 2017 or 2019.
Nintendo's First-Party for 2020
Tokyo Mirage: A Wii U port
Pokemon Mystery Dungeon: A remake of a DS/GBA game
Animal Crossing: Absolutely massive
Xenoblade DE: A remake of a Wii game
Clubhouse Games; A small title
Paper Mario: Supposedly a fun game and has sold decently, but not what people want in Paper Mario
Super Mario 3D All-Stars: A lazy, overpriced collection of old 3D Mario games. Did I mention it was a timed release?
Mario Kart Live: Blurs the line between a toy and a game, expensive.
Pikmin 3 Deluxe: Wii U port
Hyrule Warriors: Fine
Fitness Boxing 2: Ok
Those are a lot of games, but how many are exciting? I like a good amount of Nintendo IPs, and only bought one of those (Animal Crossing). Usually I'll buy at least 2-3 Nintendo published games during their release year.
There were some quality third-party games for 2020, I'll admit. 2020 may have been great for shareholders, but it seemed like a lull year for a lot of Nintendo players.
Thankfully, 2021 seems better. And we probably have a few Nintendo games for this year that are unannounced.
Lifetime Sales Predictions
Switch: 161 million (was 73 million, then 96 million, then 113 million, then 125 million, then 144 million, then 151 million, then 156 million)
PS5: 122 million (was 105 million, then 115 million) Xbox Series X/S: 38 million (was 60 million, then 67 million, then 57 million. then 48 million. then 40 million)
Switch 2: 120 million (was 116 million)
PS4: 120 mil (was 100 then 130 million, then 122 million) Xbox One: 51 mil (was 50 then 55 mil)
3DS: 75.5 mil (was 73, then 77 million)
"Let go your earthly tether, enter the void, empty and become wind." - Guru Laghima
