Switch emulation development saw a major resurgence early last year, with Yuzu forks like Citron and Eden picking up where the Yuzu team left off after it was abruptly shut down by Nintendo. Yuzu, being open-source, has always been open to new teams creating forks with new features, but these projects were far more organized than early efforts like Suyu.
Nintendo's argument for taking down Switch emulators has always related directly to the circumvention of technological protection measures (TPMs), which include cryptographic keys in the console itself that are used to decrypt games. Neither Citron nor Eden bundles these keys with the emulator, with users required to mod their own consoles to import their own keys and firmware.
It also asserts that Switch games can only be legally played on official Switch hardware. Again, none of these emulators bundle ROMs or provide guidance on finding or downloading copyrighted content, yet the mere fact that they can play pirated content is a point of contention for Nintendo's legal team. The Yuzu case, which was settled out of court, didn't provide a ruling on the legality of emulation, so these claims are largely untested.
