Not sure what the gripe is here, especially with a one year notification period.
Also:
> Select Google Account email. If you can't open this setting, it might not be possible to change your email or username.
> If your account's email address ends in @gmail.com, you usually can't change it.
After I contacted Kakao support, they asked for some documents. Then they called me to verify the details. A day or two later, they updated my online profile with an editable email field, so I was finally able to update my email address.
When I contacted JCrew chat support, they performed the update immediately and emailed me a temporary password from [email protected].
Flickr and Steiger were also happy to help. TBD on the others.
So I can't think of any accounts that don't allow an email change either. But you might have to jump through some hoops.
P.S. not a gripe, just adding an anecdata.