What's the big fuss about Campag?

So that's it, it suffers from "RetroVintageness" syndrome.
It's not necessarily useful/up-to-date anymore, it just sells a lot.

sells a lot?
what you mean there is lots of it about as it was used for all kinds of frames for the 40 years while it was in production before it was replaced by steels with better material properties? (725 in 1976 and all the other steels that followed)
or that reynolds sell a lot of it?
only it hasn't been made for years (apart from the special reissue sets for doe-eyed collectors)