Except that you sleeping or not doesn't really change all that much whether you notice the security incident in the first place. It's not like you have some six

Except that you sleeping or not doesn't really change all that much whether you notice the security incident in the first place. It's not like you have some sixth sense for security incidents that just stops working while you are asleep, is it? And neither has Google. Or anyone. Now, if someone has been siphoning off your emails for months, does it matter whether you notice today or tomorrow? If you are talking about easy to detect abuses, such as participation in a DDoS attack, say: (1) those aren't really that bad for you, and if you fix them within 24 hours, not even for the attacked, and (2) your upstream provider might just notice and shut off your machine until you are awake if it's really bad. But with all that said: Neither of those is particularly likely to happen anyhow if you take care of installing updates in time. What gets owned are high-value targets, bad passwords, and machines with ancient software (as in: security update has been available for a few years), the latter two of which are trivial to avoid.