I'll give two answers.
Switch 2024 is the better year for most people and far more third-party games in quantity and quality. As much as I love Paper Mario: TTYD it is a remake that is mostly the same as the GameCube original. Super Mario Party Jamboree has been fun for me so far as well.
Mario Kart 8 and Super Smash Bros. for Wii U were quite a 1-2 Punch. 2014 was the year I got a Wii U because of those two games.
Switch 2024 I still have to vote for, but my heart is with Wii U 2014.
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: 115 million (was 105 million) Xbox Series S/X: 40 million (was 60 million, then 67 million, then 57 million. then 48 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