From my conversation with Recorded Future, two short, essential videos about identity security: how we got here, why it matters, and why it's so hard to do well.
There's no such thing as a critical vulnerability, generically. There's only a critical vulnerability that can be exploited in your environment, specifically.
One area commonly overlooked (by defenders, but not by attackers) is identity sync infrastructure. If you harden your AD but don't do this, you are wasting your time.
Because DevOps has effectively joined the Operational and Dev domains, it introduces security dependencies which neither domain had to consider before.
When an org's security personnel carry out threat modeling exercises, they tend to make unconscious assumptions about the efficacy of their own security controls. This is dangerous.