any mill can be ran 16hrs. a day ,leaving the question of "how may days'" do you want it to run ?
thats why all/most all established machinetoolbuilders quote their maintenance/lasting? periods in hrs(sometimes couple a million hrs) and you can use your hrs. as you wish.
but i guess if you replace this puppy by something like a haas ,hurco , MORI SEIKI it won't be running no 16hrs. a day to keep up anyway.
almost forgat that if you aren't machining heavyweight workpieces a bedmill is the way to go since a knee will slow you down.
i prefer x-y bed and Z on the bridge.