Are you sure? Wasn't it just that a switch version was heavily rumored since i never heard about a PC rumor.
I won't burn the source I have, but yeah, 100% sure and people can quote me on that later. It's a source that spoiled every Atlus announces to me for the past 7 years in great details and I doubt I'm the only person he's in contact with. I don't doubt him. I also know for sure he's involved with SegaJap/Atlus, at a good position.
A Switch version of Persona 5 was never in talk, as far as I remember. It was mostly inflated wishful thinking or straight liars. That doesn't mean it won't come at some point, just that the rumors were bullshit at the time.
Oh and if you want one more thing, SMTV is in dev hell right now and you won't hear about it for some times. I'd be surprised if you hear about it again before BOTW2 release.