One thing I can see happening, after analog shuts down, is the loss of transmission, during bad winter weather.
Already, in my location, when a winter storm has come across the mountain top, that has most of the station antennas, all digital channels have been lost. But in most cases, the analog signals were still on.
So, after the analog gets shut off, and a winter storm hits, it will be quite possible that there won't be any signals at all while the storm is raging.