This used to be a practice at my workplace. When there was a new manager it was "abolished" because they felt bombarded with mails every week.
But what I mostly took away from it is that I should document the work for myself. I basically have one huge journal text file that gets a new entry every day. I see it as a complete empty whiteboard and scratchpad.
It's helped me so many times when I've had to look for how I did something in the past and was able to retrieve not only the command used but also the reasoning and context!
