The post does mention Azure's Arc and Sentinel, but definitely should have called out Anthos specifically.

The interesting part of this to me isn't so much that other solutions already exist -- Azure and GCP, due to their catch-up position, have always been far more conciliatory toward the reality of other cloud workloads than AWS. It's that AWS is signaling, however grudgingly, that they will have to play ball with other clouds in order to stay ahead. That's a big shift.