And ryujinx?

I disagree. Sure, companies have a moral right to recoup their R&D costs on a console, but I fully reject the Divine Right of Shareholders. As long as the emulators aren’t sold for profit and no one is hurt, a multibillion dollar company like Nintendo has zero moral ground to tell us that we cannot emulate consoles that we have bought to play games that we also bought.

Proprietary encryption key

What if the key was in a book? It would have to be protected by free-speech, which makes it uncensorable.

What if the key contents were used as hex values to make a flag? Would you censor a flag too?

No such thing as “proprietary encryption keys” exist.