Following Nintendo's bombshell success against the Yuzu Switch emulator in court earlier this year and the subsequent Yuzu repo takedown spree, it seems that some direct contact with the lead developers of the Ryujinx Switch emulator was all it took to prompt the voluntary removal of all current and past Ryujinx downloads— no court case required.
According to a Discord message written for the Ryujinx server (and reposted to the Ryujinx Twitter with additional context, embedded below), developer gdkchan was the one directly contacted by Nintendo, who offered an unspecified "agreement to stop working on the project, remove the organization and all related assets he's in control of."
