Depends when and if there will be a Switch2 Lite.
The Switch Lite model is not the most selling, but still good for a couple of million per year and is a good family friendly priced model (also) for the multi Switch owning family. Especially if Switch2 will be $400.
If there will be no Switch2 Lite (soon), I can see the Switch Lite will keep on selling for another 4 years. In terms of content there is a mountain of 3DS games to port like Luigi Mansion 2HD.







