What I found most jarring was the close button on the wrong side of the title bar, and the wrong shape. In Windows 3.x, Close Window was the last alternative an

What I found most jarring was the close button on the wrong side of the title bar, and the wrong shape. In Windows 3.x, Close Window was the last alternative and default double-click action of the System Menu over on the left, just as it still is in at least some apps. It looked like a big 3-D minus sign -- for all apps; not a unique app icon as now -- which actually, AIUI, was a skeumorphism for the space bar, which (together with [Alt]) is what you pressed (and still do in Windows 10!) to drop down the window-handling menu. There was no Close Window button at all on the right end of the title bar in 3.x... So it took me the longest while to stop closing stuff by mistake when I just wanted to maximize / midsizify a window, after moving to NT4 which shared the W95 UI. Now, I seem to be used to it: I just had to close an app by double-clicking its system icon at the top left, to double-check that it still works that way, so apparently I don't routinely do it that way any more. (Hey, that means it took me less than twenty years to learn!)