>Am I the only one who hates graphics on t-shirts? If the design doesn't serve a clear purpose in signalling something about the user, I want it gone. I'm not convinced that we've seen any meaningful advance in t-shirt design since Windows 95.

I don't know if this helps or hurts your point, but I do in fact also hate graphical T's. All of my T-shirts are solid colors and most of them are black.

>What is the "clear purpose" of MacOS UI to have rounded corners, or the status bar to be translucent, or for the "genie" effect of minimizing an app.

Thankfully I don't have to use macOS very often, but I don't think any of those serve a purpose and they constantly (but mildly) annoy me when I do have to boot up my mac. The minimization effect is important, but it should still be fast.