The Road to 160m+ for Nintendo Switch (EDIT: See mod note in first post for new rule).

[PAOerfulone]

It appears to have dropped drastically in America and Europe, but for some reason is still holding very well in Japan.
I could see a scenario where they still sell and produce it for another 4 years at around ~1 million units each, carried largely by Japan, just because there is still just enough demand there where most of the Japanese sales are exports to smaller countries across southeast Asia, or even India - Nintendo has been trying to enter India for quite some time with little to no success. Maybe a lower priced Switch 1 with the library it has massed could be how they finally get their foot in the door. And in a country filled with nearly 1.5 billion people and still rapidly growing, there's gotta be a couple million people who are looking to purchase a Switch 1