@pjb @cwebber
Nintendo also went against Dolphin (Wii & Gamecube), Citra (3DS). And that's just the recent ones, and only emulators (we won't even mention fan-games).
They simply don't like the concept of people enjoying stuff how they like instead of the very narrow way-to-enjoy that Nintendo wants to impose as the only authorised one. They consider such "unauthorized fun" to be a violation of their IP rights and they have the lawyer warchest to fight on that hill.
[...]