My understanding is the prod keys are required to tell the software (e.g. games) that it is running on an authorised device and passes certain checks / DRM.
To run the software without prod keys would require (I think) patching each game individually to skip those checks. So it could be possible but wildly impractical unless some other work around is found.
Nintendo DMCAs Yuzu forks on GitHub (github.com) angielski
Unsurprising move. People should’ve moved them elsewhere.