You get things wrong. These five stages are designed for a single event taking place and not fitting the worldview one holds. You can't apply it to Nintendo as a whole, as Nintendo produces events all the time. You can't even apply it to something like: "Switch is a big success", as this may vary in single years. 2017 was a good launch, 2018 was not so big except at the end. 2019 may be different again. These phases are really for single events. So maybe something like: Switch sold in December 5 million in the US (or whatever it sold).