Good lookin' toolkits

How come Windows NT 4.1 shows what buttons are better than Windows 10?

Look at this:
http://www.betaarchive.com/imageupload/1311294920.or.83457.png
http://cdn0.vox-cdn.com/uploads/chorus_asset/file/2363952/win10filexplorer.0.png

How the fuck am I supposed to know what's a button and what is not?

What the fuck Microshaft? Why on EARTH are these webdesignesque hipsters throwing us back to the fucking stoneage?
It looks like even early on during Xerox Alto times, they figured out how to properly design UIs so that buttons looked like buttons, not pictograms.

Luckily, there's FLTK:
http://www.fltk.org/doc-1.1/valuators.gif
http://www.fltk.org/doc-1.3/charts.png

They aren't buttons, they are hot areas that perform an action when pressed with a mouse. Buttons only make sense in the physical world. Let's not limit ourself to using anachronistic widgets just because it was necessary to help old folks learn what it was back in the nineties.