Because Windows 7 8 9
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Because then they'd have nothing to do in the afternoon.
Because Windows 7 ate 9!!! :D
Because Windows 8 9.
Because people familiar with the U2 guitarist of the same name are already used to long delays.
Because Windows 7 ate 9.
Hey Microsoft, why is there no Windows 9? You've given us 7 and 8, and now you're skipping straight to 10?" "Well, to be completely honest, 7 8 9."