Could be wrong though about Star Fox, but I still don't it was a good idea for the series to have nothing on the Switch 1, I do know however that there would've been some games originally intended for the Switch 1 that got moved to the Switch 2. It's good to finally know either way about how Princess Peach: Showtime came to be, basically being to Peach what Luigi's Mansion is to Luigi, though it's still unknown of how her own game that could possibly spawn sequels was chosen to be about theatre of all things.

This can't be right in terms of why Yoshi & The Mysterious Book and the recent Star Fox game exists, since I don't think Yoshi's Crafted World would've been completed without deciding on what would be next for Yoshi, nor do I think they'd have done more then one game from Yoshi's sub series on the same system. And of course Miyamoto was always intent on there being a new Star Fox game somewhere down the line and wouldn't let the series stay dead forever, this most recent game in fact probably started off as a Switch 1 game in fact before being moved to the Switch 2. Pity though they left the Switch 1 without anything at all from Star Fox, not even a port of Star Fox Zero, least they could've done was a re-release of something to fill the gap. I can understand though that it was best to avoid having similar sales to Star Fox Zero probably based on when it released, but I do know for certain that Fox's inclusion though from another franchise in The Super Mario Galaxy Movie would've been to promote the new Star Fox game.