True, but what I think finally put the BB's out of service was the cost of manning and maintaining a ship that big and that old when it's more cost effective to put those same systems on smaller, more efficient ships (that also have smaller radar signatures). While there is certainly a "diplomatic" benefit of putting a powerful ship off somebody's shore - the modern CVN's fulfill that role with their longer reach.
yea the costs were pretty high. but we know what a bad guy in a small raft with a big bomb can do to modern ships too. the bomb that tore a gaping hole in the side of the gmd USS Cole would have left a flash mark on the side of the New Jersey. surface skimming antiship missiles would not penetrate the armor plate either (so i have been told).