Comment by anonymoushn

> On of our product principles is to avoid changing settings on users' behalf

Ideally there wouldn't be silent changes that greatly reduce the utility of the user's session files until they set a newly introduced flag.

I happen to think this is just true in general, but another reason it might be true is that the experience the user has is identical to the experience they would have had if you first introduced the setting, defaulting it to the existing behavior, and then subsequently changed it on users' behalf.