Let me say it the other way around. A single older adult probably has more incentive to leave the marital home and move to a community that provides companionship and takes care of things like lawn mowing, leaf raking, snow shoveling, household maintenance, etc.

LOL!!! That is why we built our house in Arkansas. Instead of 5 inches of snow a day in the winter, we get 5 inches of snow a year. As Andy has gotten older, the snow shoveling and lawn mowing has beaten him up more and more. We don't have a lawn here - almost everyone in the community has gravel. The leaves are a problem, but we are going to hire someone to get rid of them for us.

I think that the bigger incentive for staying in the marital home is the number of family members and close childhood friends that live nearby - regardless of whether or not one is single.