From what I am hearing what triggered it was Yuzu paywalling emulator fixes for TOTK on patreon, before TOTK was even out (meaning it can only be acquired through piracy from that leak). That can be interpreted as promoting piracy and we all know that's a huge no-no in Nintendo's book. I am not surprised Yuzu folded. They flew a little too close to the Sun.
Software pirates/emulators need to keep in mind that they can only continue to get away with it when they avoid Nintendo's Eye of Sauron (lawyers) and don't make any money off it. The moment either of those statements becomes untrue, they are fucked.
We have fallen so low that a female character wearing an iconic attractive outfit that hasnt been fucked with is a win.