For the Wii it didn't break anything for things that had online aspects. There may be some games like Pokémon gen 6&7 that will lose access to a good amount of content, but at this point the 3DS has been completely broken by homebrew, and I'd imagine they'll do what they did with MarioKart Wii and set up new servers for the most popular games.
I think the biggest problem is closing Pokemon Bank breaks the chain that lets you transfer Pokemon from all the way back in Gen 3 up to the modern Switch games.
Does this break single player games?
For the Wii it didn't break anything for things that had online aspects. There may be some games like Pokémon gen 6&7 that will lose access to a good amount of content, but at this point the 3DS has been completely broken by homebrew, and I'd imagine they'll do what they did with MarioKart Wii and set up new servers for the most popular games.
I was curious about this as well.
The Wii U was probably my least played Nintendo console. But I am curious if any single-player games get affected by this.
I think the biggest problem is closing Pokemon Bank breaks the chain that lets you transfer Pokemon from all the way back in Gen 3 up to the modern Switch games.
Apparently, Pokemon Bank will remain untouched... for now.