Perhaps families rarely have formal sit down meals any more?
My family ate breakfast and dinner ever day together from 1945- 1963 plus all meals Sat and Sunday, except during Korea and my fathers first tour in RVN as an advisor. We always were expected to use proper table manners plus Sundays and holidays were times for those special forks, glasses, plates, etc. My sister and I had best know how Irma set the table or get the cook book out and set the table.
My kids complain that they have to come in for supper, while their friends don't. More than once I've asked, "Don't these people eat supper?" Maybe not.