Yep. All of the identity and access management services for the non-China public cloud are in us-east-1. https://news.ycombinator.com/item?id=48071472

All the control plane. Data plane is distributed and roles using iam to access resources can still do so during a control plane outage.

Yes, you're right, but in my experience the boundary between the data plane and the control plane is not always clear, and especially unclear on these foundational and basic services.

There were enough "surprisingly control-plane" IAM operations in the AWS services that I dealt with, so we had to exercise extreme caution during outages.

It's literally documented. Try reading it and educating yourself.

I worked there.

Even if I were the stupidest and least curious engineer around (and I was far from it), that's basically irrelevant to what you're scolding me for here…

As part of a team with both software development and operational responsibilities, like most teams at AWS, I had to deal not only with the consequences of my own imperfect knowledge, but also with the imperfect knowledge of my coworkers past and present.