More than one writer refuses to use a computer, preferring typewriters. Harlan Ellison learned how to repair typewriters after he could no longer find anyone to fix his. Stephen King wrote Dreamcatcher with a fountain pen.
Authors totally obsess over details that seem irrelevant to people outside that craft.
As an aside, I consider this a strength of Stephen King's best stories. The boys, their friendship and the kid-logic they employ in stories like The Body and It. By the time he wrote Dreamcatcher it had become a little hackneyed, but still.