Windows' might be complex, but it is NOT graceful. If you have notepad open with unsaved text, then shutdown will never shut down - but nothing on the screen will make this obvious to a non-technical person.
My guess: it's a mouthful and not catchy. "Linux" is short, catchy and easy to pronounce. With "GNU/Linux" I don't even know if I'm supposed to spell out the GNU or pronounce it as a word, and I don't know if I'm supposed to say the "/" as "slash" or "plus" or "and" or if it should actually just be silent. I like to type how I speak, so if I don't know how to say it I'm not going to write it, and I'm not going to like reading it.
I can totally see the merits for "GNU/Linux" but don't underestimate the importance of catchiness. Maybe if it were shortened to "Ginux" it could stand a better chance, but then we'd have another gif situation.
In IEEE arithmetic, division of 0/0 or ∞/∞ results in NaN, but otherwise division always produces a well-defined result. Dividing any non-zero number by positive zero (+0) results in an infinity of the same sign as the dividend. Dividing any non-zero number by negative zero (−0) results in an infinity of the opposite sign as the dividend. This definition preserves the sign of the result in case of arithmetic underflow.
In IEEE arithmetic, division of 0/0 or ∞/∞ results in NaN, but otherwise division always produces a well-defined result. Dividing any non-zero number by positive zero (+0) results in an infinity of the same sign as the dividend. Dividing any non-zero number by negative zero (−0) results in an infinity of the opposite sign as the dividend. This definition preserves the sign of the result in case of arithmetic underflow.