Because that is how the physchy of modern man is, we expect development and gain in everything we do. Car manufacturers exploit this mercilessly and are very successful because of it.

As much as I admire the F18 class, if a better class emerges that will carry the same crew, is more modern, less weight, starts winning races and pushed by the major manufacturers ( particulalry if it was selected as the Olympic boat ) then it will be only a matter of time before the F18's are losing cliental to both the F16's and the new F17.5's