Before figuring out how to tackle this project, I needed to know whether it would even be possible. According to a 2021 Reddit comment: There is a zero percent chance of this ever happening. Feeling encouraged, I started with the basics: what hardware is in the Wii, and how does it compare to the hardware used in real Macs from the era. I LOL'd
To me, it was obviously possible, and I was determined to prove them wrong.
Anyway, this now exists because of that: https://github.com/bfirsh/jsnes