In hindsight what could have Nintendo done to stem piracy on Wii?

[Mr Khan]

The reason the GameCube beat it wasn't disc type, it was just the fact that it was next to impossible to physically get unsigned code running on there, due to a lack of any kind of standard data port (like Wii has SD Card and USB. GameCube had neither, closest you could get was ethernet, and then you had to jump through a lot of hoops to utilize it)