Worked for EC2 as an SE ~ 5 years ago. We used to handle rack downs and page the relevant team if there was a large set of instances for the said team impacted

Worked for EC2 as an SE ~ 5 years ago. We used to handle rack downs and page the relevant team if there was a large set of instances for the said team impacted. We once had a couple of hundreds of Amazon.com (merchant team) instances impacted. We paged the team and they were like "don't page us for anything less than 10 racks of our instances down". The burgers didn't even feel the impact. Their automation was insane.