I'm not a security engineer but I have attended a lot of talks by security people. And the feeling I get from them is: don't opt-out of security updates. You do

I'm not a security engineer but I have attended a lot of talks by security people. And the feeling I get from them is: don't opt-out of security updates. You don't want that option, it is a lose-lose for everyone involved, including your grandmother who is very likely to be a target of all kinds of scams and phishing attempts.