One thing that is totally lost to history is the ability for most to read a letter, message, e-mail or anything beyond the 180 character limit of their twitter trained brains. Or to think about how to clearly put everything they want down on a single communication so they don't have to follow back up with more parts of it or wonder if they left things out.
Back in the old days we used to send letters around the world and it might be a monzy's th between your sending the letter and getting a reply.
So if you were needing to talk something over or discuss something, you usually had to think in advance and fully spell out every detail you wanted to get across so you didn't have to wait for a month for the reply. If you were really good at it, you could include extra paragraphs asking follow up questions to different possible replies for more time savings.
I think most folks these days would grind to a halt if they had to send letters. I often type e-mails to folks about a list of questions they send me and they reply back with thanks, but what about xxx I'm then like, did you read more than the first sentence, the answer you are looking for is in paragraph 2