Azure's management APIs break connections coming from outside Azure's network every time they use DNS to execute a blue/green swap on their public load balancers. Existing connections are not gracefully drained. Terraform state gets corrupted (it thinks the operation failed when it actually succeeded and the resource was actually created) and requires manual fixing.

This happened frequently enough at large enough scale we seriously considered building an automation to attempt to analyze the Terraform logs for the connection breaking and automatically import the created resource.

Azure support was completely worthless.

> Azure support was completely worthless.

It's quite incredible that a support bill in the >10k per month range from azure makes the public google (not even GCP with a support contract) support look not crap