All of the characters in "A Christmas memory" are static. Why do you suppose Capote did this?

Capote may have made the characters in "A Christmas memory" static because of the fact that the story takes place in a very short time frame. The story happens around Christmastime of a certain year. A few days would not be enough time for a person to have a dramatic change that occurred suddenly. The story is mainly trying to show the speaker's recollection of certain events that occurred that particular holiday.