Because it's an unusual spelling. It's a latinisation of the German surname Fuchs (after the botanist Leonhart Fuchs) and is neither pronounced consistently wit

Because it's an unusual spelling. It's a latinisation of the German surname Fuchs (after the botanist Leonhart Fuchs) and is neither pronounced consistently with the surname (Fooks) nor spelled consistently with other words containing the same "sh" phoneme rendered as "sch". People will never reliably spell it right, so you have to wonder whether it's a great choice of name for an OS.