[Jasper_]

The main thing that took them down was that when Tears of the Kingdom leaked a week early, the Yuzu developers made a special build available exclusively on Patreon that was able to run it, actively marketed its ability to play a leaked game copy on their YouTube and socials, and in some cases actively pointed people to where they could find a pirated copy for themselves on their Discord server.

Nintendo could have sued them into oblivion at any time (as the court documents show, they had been stepping over the line for a long time), but chose not to. If it wasn't for the Tears of the Kingdom thing, Yuzu would probably still be around today.