Overly broad permissions can turn one compromised account into a much larger security problem. Learn how to reduce unnecessary access, review privileges, and apply least privilege across modern Linux systems. Review Linux Privileges×
Learn how easy it is to enable unattended upgrades for both Ubuntu and Debian Linux so you can be sure to keep ahead of software updates.
I run updates on my production machines every single day. Although there may not be updates for everything, it gives me a certain solace knowing I checked. I believe everyone who is serious about the privacy, security and behavior of their computers should do the same thing.
However, I also understand that life and work get in the way. This might be especially true if you have many machines to administer. Or you might have hundreds of users to tend to, and we all know how that can be.