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Nintendo DMCA Notice Wipes Out 8,535 Yuzu Repos, Mig Switch Also Targeted.
(torrentfreak.com)
This is a most excellent place for technology news and articles.
IIRC they also had some stuff going around about how Tears of the Kingdom ran better on the emulator than the actual Switch.
Pretty sure that was the point at which Nintendo decided to unleash the dogs on them