The decelerated approach has it's place so long as everything is still on the numbers. The flight data backs this up - it works. The problem is habit; - it's done so often that there is a heightened propensity to do it the same way all the time; most of the time it works well and we save a bit of gas, wear and tear on the equipment and keep neighbours who built near the airport happy. Once in a while it needs all the flap the airplane has, all the brakes and a mitt-full of reverse and to hell with the noise, the fuel flow and the maintenance costs on the reversers.