You're wrong, but ok. Unless the PS5 and X4 have valid portable options, the Switch still has its place in the mainstream. Also I believe after a 5 year cycle, we will see a Switch 2 in spring 2022. This would close the gap to at least what we already have with Switch and PS4 only 1.5 years after the PS5 lands. During that time, most games will likely still be cross gen anyways, so your predictions are way off base.
I believe you somewhat already know that though. 😉