What, no more Fermi Problems anymore? No more reasoning about how many piano tuners there are in Chicago? No more estimating how many hairs you have on your head? Not necessary to calculate the total number of sheets of 8.5 x 11 inch paper used by all the students at the University of Maryland in one semester? How many drops of water are there in Lake Erie? How many notes are played on a given radio station in a given year, has become irrelevant? What a loss ;-)