Just last week, on Tuesday, February 26th, 2024, news broke out about the Yuzu emulator team being sued by none other than Nintendo themselves, with Nintendo claiming that the emulator apparently allowed users to play certain games early (due to street dates being broken) and also allowing...
No, they largely will go after people hosting and distributing the tools. Running it privately is obviously not legal, but wouldn’t rise beyond Nintendo trying to ban you from stuff.