GitHub link to Nintendo's claim - all the details you need are here
The emulator forks which are being taken down are as follows:
Despite this, the one fork that continues, and will continue without takedown is Ryubing - by Greemdev. This is created by an original member of the Ryujinx team. It's safe, the code is beyond reproach (and violates zero laws or Nintendo code) and actually brings helpful updates.
Still...shitty news. And more indication that the Switch 2's architecture will be damn similar to that of this current Switch. Them taking emulators down means the upcoming games have a solid chance of being emulatable on release. But...that's my own (and others') conjecture, so we'll see when the time comes.
Nah… I suspect that Sony simply doesn’t want to anger hackers again. The cost of downtime is likely to be higher than the imaginary profits they get from harassing emulator communities. I doubt they think their reputation is worth much but maybe they have started to see some value on it.
Japanese gaming companies often don't seem to understand the value of the reputation / honor which is really weird considering that it's one of the things japanese culture is supposed to value.