Earlier quoted context omitted.
It's not a jump back to the 80s exactly. For example, here is an old NT screenshot: http://upload.wikimedia.org/wikipedia/en/c/ca/Windows_NT_3.1... A lot of it is flat, but they use simple bevels for buttons and other clickable elements, and its reuse on, for example, the buttons in the file manager window, looks tacky because it appears cluttered and overused. Also, excessive lines (e.g. for the window borders), hig…
The Windows 3.x UI was always ugly and didn't make any sense ;) But that's the 90's, I'm talking about the 80's. For instance: AmigaOS 1.3 (notice in the bottom-most screenshot how the buttons don't have '3D edges': http://toastytech.com/guis/amiga1.html '3D' UI elements were introduced later in AmigaOS2.0, and I remember how the user interface style guide made a big fuzz about how UI elements that appear raised are…
Older UIs like the Amiga OS one suffered from an even more limited pallet, and even worse typography.
I used BeOS as my main OS for a while and really liked it - it was very snappy and felt more "homey" (that is, more like classic MacOS) than early OSX versions did. (The browser, NetPositive, was absolutely awful though).