Maybe because C set the standard for originality and inventiveness that influenced everything before it. Hell, M was essentially just a rehash of it (although not as good).
And to the faggot calling C a 'sellout', fuck you. It's like the Die Hard 1 of action movies, it blows all it's generic shitty copycats out of the water even today. Just because on paper it looks like all the other action movies out today, doesn't mean it's just as bad.