Mechanical things, be they cars, kitchen appliances or vacuum cleaners, need to be run at least occasionally to stay in good condition. Sitting unused isn't good for any machine. In addition to the things John mentioned above, the question of whether a particular machine is up to the rigors daily or even weekly use would also largely depend on the condition of its wiring and power switch and possibly the brush roll as well. There's really no reason not to, if everything is in good shape.
