Well having grown up with parents that let me watch these movies all my life, I can say that I don't really see age as hindering anything. It can make a viewpoint more different than most. Also about the whole thing with why can't anything be better than the original, to me it's a mixed bag. It really depends where they take the franchise, some movies are better than their originals, and others are not all that great, it's also a matter of opinion, and the fact that you don't know what an Alien or Predator are until that first movie comes out, but some people also don't see the first movie first like they should and watch maybe the third movie instead and will love it more, it really just depends on a variety of things.