Seeing as Yuzu has been nintendo'd recently, what do people think will happen to ryujinx? Can Nintendo get them on the same grounds as Yuzu or would they need to come up with a new case against them?
There are many emulators for nintendo consoles. Very few are taken down by legal actions, because it is legal to develop an emulator. Hardware is functional and cannot be copyrighted.
Yuzu's problem was they supported piracy. They made special patches of the emulator to play leaked games which they sold through patreon. That's how you get sued for piracy.
Ryujinx does not allow discussions of piracy, commercial ROMs, or firmware on any of their own platforms. The emulator can play commercial games, but they only link to instructions on how to dump your own cartridges and firmware from legally purchased sources.
That is how smart developers protect themselves from lawsuits. It has worked for Dolphin, and many other emulators. Ryujinx will probably be just as safe.
Suspect they meant that when Tears of the Kingdom leaked early, a bunch of "Breath of the Wild" compatibility and performance patches came out for their early-access Patreon only builds. Or at least, that's what's been the scuttlebutt about the affair.
Personally I hope im wrong, but Im seeing lawsuit after lawsuit and emulators being taken down like ryujinx, dolphin, all of them. They may be smart, but Suyu was just taken down as well.
Dolphin was not taken down. Dolphin was not allowed to launch on Steam because Nintendo threatened Valve with a lawsuit. Regardless of the merits of the case, Valve doesn't want to pay to defend a case so they can distribute a free emulator, so they caved and blocked Dolphin's Steam release.
Nintendo claimed Dolphin violates the DMCA but have not taken any direct legal action against Dolphin as far as I am aware.