Ok, so it didn’t even need upnp then. Are you talking about using their LAN head-to-head feature across the internet? Or perhaps all the times I used my switch on various networks to play head-to-head games it was… my imagination? Sure. If people had to consistently forward every port on their home router to play Fortnite, smash, etc. with a portable console you’d never hear the end of it. This is literally the first time I encountered someone saying this was a problem. Regardless, most people don’t buy routers— they use the ones their ISPs gave them, and I haven’t seen one of those come without upnp in at least a decade. You’re seeking out reasons to dislike NAT.