According to an official statement on Ryujinx’s Discord server, developer gdkchan was contacted by Nintendo and they were offered an agreement to stop working on the emulator project, and while the agreement wasn’t confirmed yet, the organization has been entirely removed.
It may happen once the Switch has reached its end-of-life. There would be less chance of N going after someone if their console is dead.
No, not impossible. I know they went after the melee community. But whoever picks up the torch would have less of a crosshair on their back at that point in time.