I know this is the case for certain changes such as allowing users to delete their accounts. I remember the new apps/updates being bifurcated with updates being

I know this is the case for certain changes such as allowing users to delete their accounts. I remember the new apps/updates being bifurcated with updates being allowed for a few months after it went into effect for new apps but for this system dialog change I'm not aware of anything being said publicly about this, I think the rules just changed internally. My google-fu might be failing me but I can't even find articles about this change. It was news to me (it's in the HIG, not in the guidelines) when we got hit with it and normally I keep abreast of any new requirements/rule-changes and when they go into effect. I completely understand and agree with the different options you outline but I don't think that was done in this case, at least publically. Please, if I'm wrong and someone has a link to an article about this I'd love to see it/know about it.