Switch is ninth generation. If it were a home console only, it would be the second eighth generation console for Nintendo. Basically like the Atari 2600 and Atari 5200 in the second generation and the Sega SG-1000 and Sega Master System in the third generation. Switch as a hybrid puts it in a different generation from the Wii U, and the fact that it is also a successor to the 3DS. The leap between the 3DS and Switch is staggering.
Even if Switch 2 launches in 2023, it'll likely just be an early tenth generation console.
Lifetime Sales Predictions
Switch: 151 million (was 73, then 96, then 113 million, then 125 million, then 144 million)
PS5: 115 million (was 105 million) Xbox Series S/X: 57 million (was 60 million, then 67 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