Have been trying to get the answer to my question online with slow WiFi (I'm on a trip). I have an early 2015 MacBook Air. I understand from earlier reading and research that there is no need for me to shut down when I have finished a computer session; it is even desirably not to shut down. However, should I if I am going to take my computer on a trip? Afraid I might be harking back to the days of disk drives when shutting down would brake the drive to prevent damage. But with SSDs, I doubt that that is necessary. But I did think I would find an article actually saying it is not necessary, and, so far, I haven't.