Exactly. In windows 2000 the UI was pretty much unified, a button looked like a button, window borders were consistent, the start menu had a simple tree structu

Exactly. In windows 2000 the UI was pretty much unified, a button looked like a button, window borders were consistent, the start menu had a simple tree structure, icons were ugly but they were iconic (they at least tried to represent something, noone thought that one day a grey letter will be an icon, or a user will look lie a circle and a line). No touch nonsense, everything worked with a mouse or a keyboard (mnemonics were visible by default).