Let's be honest. The latest Apple updates have been... glitchy. I hope it's not the Microsoftification of Apple, but only time will tell. Missing Desktop items, hidden Docks, broken scanners, and mysteriously being logged in as Guest all have happened to somebody after an update. So, is it a good idea to turn off automatic updates?
First, automatic updates are only automatic when they are automatic, but we all know that they are only occasionally automatic, which means they are not automatic at all. Manual intervention has been needed in many cases. And back in the old days, updates had to be done manually -- it's the way our ancestors did it, so it should work for us. Right?
I say it can, but let's leave this up to personal preference. I have set my updates so that I need to process them myself. This gives me a chance to prepare in case something goes awry, instead of walking into the office in the morning with a half loaded Apple on the screen.
On the Mac, to update your settings go to System Preferences -> Software Updates and choose Advanced to set your preferences. On your mobile device go to Settings -> General -> Software Updates.