Nintendo goes directly after this [personal archive copy] argument in its lawsuit, arguing that buying a Switch game only means you "have Nintendo's authorization to play that single copy on an unmodified Nintendo Switch console." Any other copy is by definition an "unauthorized copy," Nintendo says, even if it's made by the original purchaser for their own personal use.
What's more, Nintendo argues that using Yuzu as a way to play legitimate Switch purchases on another platform (e.g. an Android device or Windows machine) is also forbidden. "Nintendo has the right to decide whether or when to enter the market of games for platforms other than its own console," the company writes.
This part of the argument specifically needs to be smacked and shut down by the courts. (Edit: I'm not saying what the law/DMCA says about it, but I'm saying if the court has discretion they need to shelve this argument from Nintendo.) If I purchase a digital copy of a song from Sony, I don't want to only be able to listen to it on a Sony Walkman, and only where and when Sony wants.
Hopefully they can find someone with one arm that buys switch games and plays them on PC with a special controller to bolster their case.