> “This is a very, very uncomfortable illustration of the fragility of the world’s core internet infrastructure,” said Ciaran Martin, the former Head of Britain’s National Cyber Security Center who is now a professor at Oxford University’s Blavatnik School of Government.

Is it? Azure is not "core internet infrastructure" in the same way that DNS, network peering, oceanic cables and the like are. They're just a big CSP. Your on-prem Windows box is definitely not internet infra.

If it wreaks global havoc when it fails, then it's de facto core infrastructure.