Because 7 8 9.
Santa Claus had to switch from Chimneys to Windows.
Because 7 8 9!
To cloud 9
Because 7 ate 9
Because chickens didn't exist yet.
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."
Because 7 8 9 A