Do you have other suggestions for promising successor forks?
I have been told about GreemDev which is a fork of Ryujinx and still being in development. But I honestly, don’t know much about it (have not been keeping myself up to date with it).
Though so far both the original Yuzu and Ryujinx are still working pretty great. Some small issues happens like crashes with Mario & Luigi brothership but people found work-arounds for that on Ryujinx; changing CPU to ‘‘software’’ for Mario & Luigi brothership (which hits the FPS a bit but overall stability and no crashes) and then set it back to its default for other games.
which now are in the hands of Nintendo, used to monitor which users use emulators.
No clue about Nintendo using its data to monitor users who use(d) emulators. They rather go after the developers of emulators (I think) unless someone is stupid enough to stream pirated games, tell viewers how to get them illegally and provoke Nintendo like this guy; Jesse Keighin, aka Every Game Guru.
Sudachi was an actual fork and really in development by the developer. However from what, I remember, he quit developing it because of continuously threats, insults and no appreciation from the community.