I agree Zelda has bookended Nintendo's console in the past. And i'm a little surprised Tears of the Kingdom isn't a duel release to a new console as well. I do think the switch portable-ness will keep it distinctive from the pack for a while yet. Also, the sales although slowing are still extremely good compared to other consoles at this point in their lifetime! So i don't think Nintendo is in any rush to push on to the next console.