As usually happens on a McCann thread, people divert from the OP which was about ending the search and digress into what they think happened, which is always followed by the debate about the culpability of the McCanns in the loss of their child.
I sympathise utterly with their loss, but I can only confirm my own actions as a parent, when away, our children ate with us at all meals until they were old enough to go away without us. Now they are grown ups, when we go away together, they eat with us, and their own children, for all meals, and everyone goes to bed at the same time.
That change in routine is part of the pleasure for the children, and the adults, to be able to stay up and have late nights.