The Nintendo Switch has already outsold the Wii U - The Verge
Proving the Wii U is Better Than the Nintendo Switch : r/wiiu
Nintendo Switch vs. Wii U - First Year Line-up (1st Party Published Games) : r/nintendo
Amazon.com: Brook Super Converter - Wii U to SW, Wii Retro Controller Adapter for Switch/ PS4/ PC Game Consoles, Supports Wii Taiko Drum/Classic/Fighting Stick : Video Games