[LocalH]

Well, the Wii did have an OS, that would receive updates over time. IOS was managed sort of shitty, though. Since older games would be linked with specific versions of IOS, they had to literally keep multiple versions of the OS around on NAND. They would occasionally stub out specific slots (usually those used by the System Menu, or by internal-only discs, or even slots they never used but that pirates did use).

Agreed, however, that all PPC code running during a game came from code on the disc, even "OS" things like the Home menu. The IOS code largely gatekept the advanced Wii features as compared to the GC