The length of a single piece of communication might be a function of bandwidth. If my only way to reach you is by a handwritten letter that must travel by ship

The length of a single piece of communication might be a function of bandwidth. If my only way to reach you is by a handwritten letter that must travel by ship across an ocean, I'm probably going to say more than "Yo." Edit: joshuamorton made the same point while I was working on this comment.