Given this, perhaps it is unavoidable that reservations departments for carriers such as Alaska Airlines are experiencing hold times over nine hours? No. It's not unavoidable at all. All of this is happening because companies have made choices that allow it to happen. Airlines can't foresee precisely when they are going to have massive travel delays due to nationwide severe weather, but it's certain to happen.
While it may be impossible to meet staffing demands for such events, they reduce staffing needs by an order of magnitude with effective online rebooking systems. Instead, carriers are slow to automatically rebook, online rescheduling is glitchy, and many website users get messages telling them they cannot rebook online and must call instead. Whether this is managerial incompetence, cost-saving measures, legacy software systems, or something else, I don't know.