Most computers firmware can store a Windows executable. Microsoft pushed for an addition to the ACPI tables called WPBT. That stores a Windows exectuable in the firmware. It is of course totally used for the intended purpose…

The difference is that Proton wasn’t a thing the first time.

Nier Automata gets really meta…

Do we know that for certain? Maybe they have the DNA but it isn’t the resulting phenotype. I.E. There is nothing preventing two brunettes from having redheaded children.

This doesn’t contain the game code either. It takes a user-supplied ROM and converts it to an executable. Nintendo do not own the code that performs the conversion.

IIRC main Fedora used to not do this until some update crashed people’s sessions including the update process which left their install in an unbootable state.

The ostree based versions like Silverblue avoid this by their updates not touching the running system and instead creating a new folder structure with the updates applied that will be booted into on next boot.