The next most common factors is a drop in household income, which can be related to the death of a spouse or an independent factor. (Note: People who shift from owning to renting are generally economically less well-off than those who continue to own.) And the third factor: nursing home entry of a family member.
While he's cryptic about what that means, he does note that there would be a shift away from valuing gross margins -- in other words, the company may take a hit on profits to make its device sales sing.