Keeping a journal has different connotations for different people. It could be old-fashioned and noble for one, practical and analytical for another, or stupid and pretentious for the next person. I used to be that next person.
What good is there in recapping the events of the day, laboriously putting down the details of all that transpired? I think the answer to this remains “not much.” But that is also not the best way of doing it. If you only wanted a record of what happened, a miniature camera could do a better job.