Lukas Mathis on the Wii-to-Wii U upgrade experience:
At this point, all of my stuff had been deleted from the Wii, but the Wii U had decided that it couldn’t read my SD card. Which meant that all of my games were in limbo, neither on my Wii, nor on my Wii U. I was starting to come to terms with the idea that Nintendo had effectively stolen my Wii games from me.
Mathis’ experience sounds like one of the better ones I’ve read. I can’t imagine what it would be like if this were any worse, which it has been for some.