My family has dwindled to just a few. My grandparents, parents, aunts, uncles, some cousins and two brothers have passed on. That leaves very little, and the coherent bond is now shattered forever.
I don't know about those that visit. I have glimpses into their lives, but it's not the day to day stuff that gives an accurate assessment. For those that have family, the next few weeks are what brings families together, and gives the hope there will be someone to share the quiet moments of the holidays. It passes in a fleeting moment; and you don't know what you lost, until it's gone.