there is hardly a company out there that sells consumer skis that don't come ready to ride, with wax. Aside from fischer and few other companies that use a wax/baking process , the factory wax isn't well penetrated.
As far as general upkeep of your skis , there is so much to be said about a well waxed base for the conditions, in nearly every aspect of skiing. ie. Flowing through the powder, not sticking, gaining ever ounce of speed in a short inrun, or long table, stomping landing riding away with speed. Also a well saturated base will help the longevity of you base. Waxing is well worth it.