I think that is the flawed conscious reason for these icons getting excessively oversimplified and minimalistic. And why the Save floppies were replaced with inconsistent crap. And some higher-up at Apple's severe untreated OCD is the reason for the excessive uniformity (squircle jail, one saturated dominant color, the geometric "grid system" they keep bragging about at keynotes). Look at old Launchpad screenshots from OS X Lion and you'll see what drove that guy nuts and made him ruin every icon.

I showed this timeline to non-technical people around me and they prefer... the original pen pot.