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I'm kinda torn about this. Not about the question as it is, but about the generation thing at all. On the one hand, I see the usefulness to group things in the same category. On the other hand it is only working because most of the time the manufacturers decided to release their platforms not to far removed from each other.
But there are already examples that stretch the definitions of gens. Look, the Dreamcast and Xbox weren't sold at the same time (Dreamcast was killed 2001, end of 2001 released the Xbox). Still they both are counted towards the PS2-gen. In reality though Dreamcast and Xbox never competed against each other.
Depending on the overlap it makes sense to me, to compare the Switch to both, the PS4 and Xbox One, but also to PS5 and Scarlett. At least if Nintendo does not release Switch 2 a year after PS5 drops.
