OK folks. Show of hands.
First, who thinks that a 57 page anything is a 'memo'?
Second, who here wants to run the numbers on the time it takes to read and understand a 57 page 'memo' so that you can actually use that info?
Once that sinks in, ask yourselves where anyone actually has time to do that in a day, in fact EVERY day by implication and ALSO do their job on matters not contained in that 'memo'.
Sounds to me this is more propaganda promoting the brilliance of Barry. Now for the bonus ponderable:
Barry, a man who played more video games than I do, a man whose love of paperwork is so great that no one ever found any of his output from his ...ahem...'professor' years...is gonna do that?
1/ It's not. It's a novella.
2/ A good rule of thumb for a well written and sourced, concise document is a minute per page. Some people are faster, some are slower, of course. Depends on their reading speed, their familiarity with the subject, time of day - you name it.
3/ No one does. That's why the command structure is so important, with each level handling their own issues and only kicking upstairs items that are out of their field or above their pay grade. 70% of the memos the person at the top, be it a CEO, a president, or a general, gets should be short informational memos: "We did this and this and this. Details of the reasoning are available here." The other 30% are problems and requests for direction - things the guy at the top is paid the big bucks to handle.
In short - the President SHOULD be getting short memos, in an effectively functioning system. If it takes more than a page or two, a face to face is needed.
Side note - I have zero problem with Trump preferring to get his information verbally. Some people just process information faster and better that way. Especially at the moment, when part of the information that needs to be processed is "How good/effective is this person in this capacity."