Didn't Apple change everything from "Metal" to "Plastic" a few years ago?

Anyway, I use 1px red borders as my window border. Why waste valuable screen real estate on something that you can't interact with?

Aesthetics.

I thought they were called computers, not aestheticsers.

I suppose you have a hard wooden bench for a seat in your car also...

I don't spend most of my time on the computer computing, though I'm sure there are people who do. They're not called e-mailers or Webbers either. There's nothing wrong with tweaking your environment to provide a more comfortable experience. It's the same principle behind having a comfortably furnished house or apartment.