OpenBSD is often described as "security focused", but this isn't really what its hat is. The key value of OpenBSD is good engineering practice, which ends up leading you to practices like privilege separation (and OS features to facilitate privilege separation) which aren't "security" so much as they are good defensive engineering - you write your software to be correct and not fail; you also write it so that when it fails it can't do much damage; you also write it so that faults crash loudly and hard rather than quietly doing damage, and so on.