[neuronic]

Apple swims in money and can't even be bothered to implement a hassle-free way of changing your Apple ID, especially if you own more than one device and even worse if you have 'Find My' enabled on them.

More than one person just last week got stuck in a loop where the system wants credentials for your old deactivated Apple ID. The solution isn't hard but the UX flow fucking sucks.

You must manually sign out of all devices using your old ID and sign in again. Except before you can do that you have to disable Find My. With the deactivated credentials again.

It shows the OLD email and wants the old password but you have to actually enter the NEW password in the dialogue so Find My deactivates and you can sign out.