Is the Christmas card obsolete? I suppose the answer depends on what function you think the Christmas card is intended to serve, if any at all. Surely it is no longer intended to convey information. Email and social networks do a more efficient job, and including a Christmas newsletter or family photograph (I do both) will earn you only scorn from any self-respecting British snob.
Some believe that the Christmas card list, where we keep track of old favours and slights, is a sort of passive-aggressive vendetta. There is truth in this. Late in 1974, two sociologists, Phillip Kunz and Michael Woolcott, posted more than 500 Christmas cards to people they did not know. Some of them were “high status” cards, using expensive materials and signed “Dr and Mrs Phillip Kunz”. Others were from “Phillip and Joyce Kunz” or used cheaper stationery or both.
The Kunz family received, along with a complaint from the police, some rather touching replies: “Dear Joyce and Phil, Received your Christmas card and was good to hear from you. I will have to do some explaining to you. Your last name did not register at first . . . Please forgive me for being so stupid for not knowing your last name. We are fine and hope you are well. We miss your father. They were such grand friends.”