How much of Azure infrastructure is managed by Windows? Are they using their own operating systems, hardware devices, drivers, firmware blobs and tools, or are they struggling like everyone else to glue all that FOSS together securely?
This is vaguely like Kubernetes but worse.
So for example they can’t do zone affinity for traffic routing, so all of their zone-redundant traffic ping-pongs between data centres like crazy.
If you use just a couple of layers of their services like private endpoints and app gateway, you can expect to see 15ms response times.