Hacker News Reader

I can't see why they'd use the most common/popular region as a guinea pig.

Problem: you've gone as far as you can go testing internally or with test groups. You know there are edge cases you'll only identify by having enough people test it.

Solution: push it to production on the zone with the most users and see what breaks.

The guideline has been to deploy to it last.

If the team follows pipeline best practices, they are supposed to deploy to a single small region first, wait 24 hours, and then deploy to more, wait more, and deploy to more, until finally deploying to us-east-1.

This is not true. Lambda updates us-east-1 last.

false, it's often 4th iirc, SFO (us-west-1) is actually usually first.

At my org it was deployed in the middle, around the fourth wave iirc