Is nintendo the winner of the 8th gen or the 9th gen?

[Louie]

Just some thoughts:
1) What if Nintendo created Schroedingers console? They simultaneously won and lost the 8th generation with the Switch and the Wii U, respectively.
2) If we count the PSP as a home console, Sony actually won the 7th generation.
3) We could put Nintendo's and Sony's consoles into separate generations. That way, both companies will win 100% of the generations they partake in, as long as release schedules stay the same as they are now.

On a serious note: I think the best way to think about this is to simply look at yearly sales trends over a prolonged period of time and add both home and handheld (and hybrid) consoles to that. An actual market share graph.