I want to know the answer to the following question:
Why would some SNESes be only partly yellow?
All the background I'm provided with is that "The ABS plastic used in the casing of some older SNES and Super Famicom consoles is particularly susceptible to oxidization on exposure to air, likely due to an incorrect mixture of the stabilizing or flame retarding additives.". Is that enough to answer the question?
Answer: no