The original discussion was about desktop operating systems but if you toss in iOS, how many look-and-feel changes does that add? Given the state of Marzipan apps that Apple thought were fine to ship, it may be ever more relevant. Apple didn't even replace the "slot machine" date picker from iOS which is horrible to use with a mouse.

Microsoft is the same as its always been but acting like Apple has a clear, unified, and sane design doesn't reflect the evidence.