Smart leaders don't react, they respond. Now is not the time to wax poetic about the world we left behind, or follow the reactionists backwards towards a demonstrably worse risk position.
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.