[nickvanw]

I've never worked at AWS, but I have worked on smaller systems where people depended on defaults. Speaking first hand, it is EXTREMELY difficult to get changes to defaults shipped on a system with as much usage as S3.

You are, inevitably, going to break someone's workflow for a reason that you cannot possibly fathom. They are going to be unhappy. At least one of them is going to come across your boss' boss' desk and they're going to wonder if this change is _really_ necessary.

Every incentive, even with this default behavior being bad, is to leave it the way it is.

Respect to the AWS people that got this across the line.